Decision tables: Difference between revisions
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Use this [[wp:Decision_table#Example|example]] of Printer Troubleshooting given in the Wikipedia article.
<br><br>
=={{header|11l}}==
{{trans|Kotlin}}
<syntaxhighlight lang="11l">V conditions = [
(‘Printer prints’ , ‘NNNNYYYY’),
(‘A red light is flashing’ , ‘YYNNYYNN’),
(‘Printer is recognized by computer’, ‘NYNYNYNY’)]
V actions = [
(‘Check the power cable’ , ‘NNYNNNNN’),
(‘Check the printer-computer cable’ , ‘YNYNNNNN’),
(‘Ensure printer software is installed’, ‘YNYNYNYN’),
(‘Check/replace ink’ , ‘YYNNNYNN’),
(‘Check for paper jam’ , ‘NYNYNNNN’)]
V nr = conditions[0][1].len
V np = 7
print(‘Please answer the following questions with a y or n:’)
[Bool] answers
L(condition) conditions
V inp = ‘’
L
inp = input(‘ ’condition[0]‘ ? ’).uppercase()
I inp C (‘Y’, ‘N’)
L.break
answers.append(inp == ‘Y’)
print("\nRecommended action(s):")
L(r) 0 .< nr
L(c) 0 .< conditions.len
V yn = I answers[c] {‘Y’} E ‘N’
I conditions[c][1][r] != yn
L.break
L.was_no_break
I r == np
print(‘ None (no problem detected)’)
E
L(action) actions
I action[1][r] == ‘Y’
print(‘ ’action[0])
L.break</syntaxhighlight>
{{out}}
<pre>
Please answer the following questions with a y or n:
Printer prints ? n
A red light is flashing ? n
Printer is recognized by computer ? n
Recommended action(s):
Check the power cable
Check the printer-computer cable
Ensure printer software is installed
</pre>
=={{header|Ada}}==
First the specification of a generic decision table package:
<
type Condition is (<>);
type Action is (<>);
Line 33 ⟶ 89:
end Generic_Decision_Table;
</syntaxhighlight>
Next, the implementation of the generic decision table package:
<
procedure React(Rules: Rule_A) is
A: Answers;
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end Generic_Decision_Table;
</syntaxhighlight>
That was easy! Now we implement the printer troubleshooting application:
<
procedure Printer_Decision_Table is
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begin
DT.React(R);
end Printer_Decision_Table;</
Sample output:
<pre>> ./printer_decision_table
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=={{header|AutoHotkey}}==
<
(
Printer does not print |Y|Y|Y|Y|N|N|N|N|
Line 229 ⟶ 285:
Res .= Act%A_Index% "`n"
GuiControl,, Output, % Res
return</
=={{header|AWK}}==
<syntaxhighlight lang="awk">
# syntax: GAWK -f DECISION_TABLES.AWK DECISION_TABLES.TXT
BEGIN {
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return
}
</syntaxhighlight>
<p>decision table:</p>
<pre>
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=={{header|C}}==
With flaky keyboard input:<
#define N_COND 3
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}
return 0;
}</
A red light is flashing? n
Printer is unrecognised? y
Line 392 ⟶ 448:
Check the power cable
Check the printer-computer cable
Ensure printer software is installed</
=={{header|C++}}==
{{trans|Java}}
<syntaxhighlight lang="cpp">#include <iostream>
#include <string>
#include <vector>
const std::vector<std::pair<std::string, std::string>> conditions = {
{"Printer prints", "NNNNYYYY"},
{"A red light is flashing", "YYNNYYNN"},
{"Printer is recognized by computer", "NYNYNYNY"}
};
const std::vector<std::pair<std::string, std::string>> actions = {
{"Check the power cable", "NNYNNNNN"},
{"Check the printer-computer cable", "YNYNNNNN"},
{"Ensure printer software is installed", "YNYNYNYN"},
{"Check/replace ink", "YYNNNYNN"},
{"Check for paper jam", "NYNYNNNN"},
};
int main() {
const size_t nc = conditions.size();
const size_t na = actions.size();
const size_t nr = conditions[0].second.size();
const int np = 7;
auto answers = new bool[nc];
std::string input;
std::cout << "Please answer the following questions with a y or n:\n";
for (size_t c = 0; c < nc; c++) {
char ans;
do {
std::cout << conditions[c].first << "? ";
std::getline(std::cin, input);
ans = std::toupper(input[0]);
} while (ans != 'Y' && ans != 'N');
answers[c] = ans == 'Y';
}
std::cout << "Recommended action(s)\n";
for (size_t r = 0; r < nr; r++) {
for (size_t c = 0; c < nc; c++) {
char yn = answers[c] ? 'Y' : 'N';
if (conditions[c].second[r] != yn) {
goto outer;
}
}
if (r == np) {
std::cout << " None (no problem detected)\n";
} else {
for (auto action : actions) {
if (action.second[r] == 'Y') {
std::cout << " " << action.first << '\n';
}
}
}
break;
outer: {}
}
delete[] answers;
return 0;
}</syntaxhighlight>
{{out}}
<pre>Please answer the following questions with a y or n:
Printer prints? n
A red light is flashing? n
Printer is recognized by computer? n
Recommended action(s)
Check the power cable
Check the printer-computer cable
Ensure printer software is installed</pre>
=={{header|COBOL}}==
<
identification division.
program-id. 'decisiontable'.
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end program 'decisiontable'.
</syntaxhighlight>
{{out}}
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=={{header|D}}==
<
immutable struct DecisionTable {
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d.consult;
}</
{{out}}
<pre>Printer is unrecognised? [y=yes/others=no] no
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===Alternative Version===
{{trans|C}}
<
struct DataPair(size_t N) {
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writeln(" ", sol.message);
}
}</
{{out}}
<pre>Printer does not print? [y=yes/others=no] no
Line 641 ⟶ 773:
So, you don't have a problem then?</pre>
Keyboard handling is sketchy, just type "true" or "false" to each question.
=={{header|FreeBASIC}}==
<syntaxhighlight lang="freebasic">dim as boolean rules(0 to 2, 0 to 7) =_
{ {false, false, false, false, true, true, true, true},_
{ true, true, false, false, true, true, false, false},_
{false, true, false, true, false, true, false, true} }
dim as boolean actions(0 to 4, 0 to 7) =_
{ {false, false, true, false, false, false, false, false},_
{ true, false, true, false, false, false, false, false},_
{ true, false, true, false, true, false, true, false},_
{ true, true, false, false, false, true, false, false},_
{false, true, false, true, false, false, false, false} }
dim as string rule_names(0 to 2) =_
{"Printer prints", "A red light is flashing",_
"Printer is recognized by computer"}
dim as string action_names(0 to 4) = _
{"Check the power cable", "Check the printer-computer cable",_
"Ensure printer software is installed", "Check/replace ink",_
"Check for paper jam" }
dim as boolean answers(0 to 2)
for i as uinteger = 0 to 2
print rule_names(i),
input answers(i)
next i
print "---- Suggested solutions: ----"
for i as uinteger = 0 to 4
for j as uinteger = 0 to 7
if not actions(i, j) then continue for
for k as uinteger = 0 to 2
if rules(k, j)<>answers(j) then goto dontdoit
next k
print action_names(i)
dontdoit:
next j
next i</syntaxhighlight>
=={{header|Go}}==
Go has no specific support for decision tables, but they can be implemented easily. With a little ingenuity, literal data can be arranged in rows and columns in a way that preserves the visual associations of decision tables. Go has an init function that might be useful for compiling decision tables at program startup. And Go maps allow efficient lookup of actions given conditions.
<
import (
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fmt.Println(a)
}
}</
Output:
<pre>
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=={{header|Icon}} and {{header|Unicon}}==
<
record act(text,flags,aflags)
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}
}
end</
Sample Output:<pre>Printer does not print ? Y
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=={{header|J}}==
'''Solution''':<
'RULE_NAMES RULES'=: |:':'&cut;._2 noun define
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options=. a #~ y {~ #. 'Y'={.@toupper@deb@(1!:1)@1:@smoutput@,&'?'@dtb"1 q
(,~ ('/'cut'Suggested resolutions:/Solution unknown.') {::~ 0=#) options
)</
'''Example''' (''solution found''):<
Having trouble? Let's track down the problem:
Printer does not print?
Line 833 ⟶ 1,009:
Check the printer-computer cable
Ensure printer software is installed
Check/replace ink </
'''Example''' (''solution not found''):<
Having trouble? Let's track down the problem:
Printer does not print?
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N
Solution unknown.
</syntaxhighlight>
=== Comments ===
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=={{header|Java}}==
{{trans|Kotlin}}
<
import java.io.IOException;
import java.io.InputStreamReader;
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}
}
}</
{{out}}
<pre>Please answer the following questions with a y or n:
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===Interactive===
Since this is an interactive web page, results can't be listed. See http://jsfiddle.net/rGP6C/1/ for a live demo.
<
<head></head>
<body>
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});
</script>
</html></
===DecTab object===
This implements a DecisionTable object called <code>DecTab</code>. The JavaScript dialect is Microsoft's JScript.
<
var DecTab = function () {
this.conditions = [];
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}
}
</syntaxhighlight>
The task is rendered as follows
<
function Ask(q) {
WScript.StdOut.Write(q);
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.RulesActions(["Y", "N", "Y"], [])
.Decide();
</syntaxhighlight>
And a sample run
<
C:\>CScript DecisionTable.js
Printer prints [Y/N]?Y
Line 1,119 ⟶ 1,295:
Printer is recognized by computer [Y/N]?Y
Check/replace ink.
</syntaxhighlight>
=={{header|jq}}==
{{trans|Wren}}
{{works with|jq}}
'''Works with gojq, the Go implementation of jq'''
In the following solution, `input` is used to read the user's
yes/no responses, and so jq should be invoked with the -R and -n command-line options.
Because of the limitations of jq's I/O capabilities, the
prompts for this task are written to stderr, which unfortunately makes them
untidy.
<syntaxhighlight lang="jq">def get_response:
input
| if . == "Y" or . == "y" then "Y"
elif . == "N" or . == "n" then "N"
else null
end;
def ask($prompt):
def ask:
$prompt|stderr
| get_response
| if . then . else ask end;
ask;
def conditions: [
["Printer prints" , "NNNNYYYY"],
["A red light is flashing" , "YYNNYYNN"],
["Printer is recognized by computer", "NYNYNYNY"]
];
def actions: [
["Check the power cable" , "NNYNNNNN"],
["Check the printer-computer cable" , "YNYNNNNN"],
["Ensure printer software is installed", "YNYNYNYN"],
["Check/replace ink" , "YYNNNYNN"],
["Check for paper jam" , "NYNYNNNN"]
];
def interact:
conditions as $conditions
| actions as $actions
| ($conditions|length) as $nc
| ($actions|length) as $na
| ($conditions[0][1]|length) as $nr # number of rules
| 7 as $np # index of 'no problem' rule
| "Please answer the following questions with a y or n:",
( reduce range(0; $nc) as $c ( null;
.[$c] = ask("\($conditions[$c][0])? ") )) as $answers
| ("\nRecommended action(s):",
label $out
| range(0; $nr) as $r
| if all( range(0; $nc); $conditions[.][1][$r:$r+1] == $answers[.])
then if $r == $np
then "None (no problem detected)."
else $actions[] | select(.[1][$r:$r+1] == "Y") | .[0]
end,
break $out
else empty
end ) ;
interact
</syntaxhighlight>
'''Example (transcript)'''
<pre>
$ jq -rRn -f decision-tables.jq
Please answer the following questions with a y or n:
"Printer prints? "n
"A red light is flashing? "n
"Printer is recognized by computer? "n
Recommended action(s):
Check the power cable
Check the printer-computer cable
Ensure printer software is installed
</pre>
=={{header|Julia}}==
{{trans|Perl}}
<
("A red light is flashing", 0b11001100),
("Printer is unrecognised", 0b10101010)]
Line 1,156 ⟶ 1,411:
decide(queries, answers)
</
<pre>
Printer does not print?: y
Line 1,166 ⟶ 1,421:
=={{header|Kotlin}}==
<
val conditions = listOf(
Line 1,214 ⟶ 1,469:
return
}
}</
Sample input/output:
Line 1,228 ⟶ 1,483:
Ensure printer software is installed
</pre>
=={{header|Lua}}==
{{trans|C++}}
<syntaxhighlight lang="lua">function promptYN(q)
local ans = '?'
repeat
io.write(q..'? ')
ans = string.upper(io.read())
until ans == 'Y' or ans == 'N'
return ans == 'Y'
end
function getCharAt(s,i)
return string.sub(s,i,i)
end
conditions = {
{"Printer prints", "NNNNYYYY"},
{"A red light is flashing", "YYNNYYNN"},
{"Printer is recognized by computer", "NYNYNYNY"},
}
actions = {
{"Check the power cable", "NNYNNNNN"},
{"Check the printer-computer cable", "YNYNNNNN"},
{"Ensure printer software is installed", "YNYNYNYN"},
{"Check/replace ink", "YYNNNYNN"},
{"Check for paper jam", "NYNYNNNN"},
}
nc = #conditions
nr = string.len(conditions[1][2])
answers = {}
print('Please answer the following questions with a y or n:')
for i,v in pairs(conditions) do
answers[i] = promptYN(v[1])
end
print('Recommended action(s)')
for r=1,nr do
local skip = false
for c=1,nc do
local yn = answers[c] and 'Y' or 'N'
if getCharAt(conditions[c][2], r) ~= yn then
skip = true
break
end
end
if not skip then
if r == nr then
print(" None (no problem detected)")
else
for i,a in pairs(actions) do
if getCharAt(a[2], r) == 'Y' then
print(" ", a[1])
end
end
end
end
end</syntaxhighlight>
{{out}}
<pre>Please answer the following questions with a y or n:
Printer prints? n
A red light is flashing? n
Printer is recognized by computer? n
Recommended action(s)
Check the power cable
Check the printer-computer cable
Ensure printer software is installed</pre>
=={{header|Nim}}==
We have defined a generic decision table object and used it with the Wikipedia printer example.
<syntaxhighlight lang="nim">import strutils, tables
####################################################################################################
# Generic defintion of the decision table.
type
DTable[Cond, Act: Ordinal] = object
questions: array[Cond, string]
answers: array[Act, string]
rules: Table[set[Cond], seq[Act]]
proc initDTable[Cond, Act](): DTable[Cond, Act] = discard
proc addCondition[Cond, Act](dt: var DTable[Cond, Act]; cond: Cond; question: string) =
if dt.questions[cond].len != 0:
raise newException(ValueError, "condition already set: " & $cond)
dt.questions[cond] = question
proc addAction[Cond, Act](dt: var DTable[Cond, Act]; act: Act; answer: string) =
if dt.answers[act].len != 0:
raise newException(ValueError, "action already set: " & $act)
dt.answers[act] = answer
proc addRule[Cond, Act](dt: var DTable[Cond, Act]; rule: set[Cond]; acts: openArray[Act]) =
if rule in dt.rules:
raise newException(ValueError, "rule already set.")
dt.rules[rule] = @acts
proc askQuestion(question: string): string =
while true:
stdout.write question & ' '
stdout.flushFile()
result = stdin.readLine().strip()
if result in ["y", "n"]: break
proc apply[Cond, Act](dt: DTable[Cond, Act]) =
# Build condition set.
var conds: set[Cond]
echo "Answer questions with 'y' or 'n'"
for cond, question in dt.questions:
if question.len == 0:
raise newException(ValueError, "missing question for condition: " & $cond)
let answer = askQuestion(question)
if answer == "y":
conds.incl cond
# Apply rule.
echo()
if conds in dt.rules:
echo "Actions recommended:"
for act in dt.rules[conds]:
echo "- ", dt.answers[act]
else:
echo "No action recommended."
####################################################################################################
# Decision table for Wikipedia printer example.
type
Condition {.pure.} = enum PrinterPrints, RedLightFlashing, PrinterRecognized
Action {.pure.} = enum CheckPowerCable, CheckPrinterCable, CheckSoftware, CheckInk, CheckPaperJam
const
Questions = [PrinterPrints: "Does printer print?",
RedLightFlashing: "Does red light is flashing?",
PrinterRecognized: "Is printer recognized by computer?"]
Answers = [CheckPowerCable: "check the power cable",
CheckPrinterCable: "check the printer-computer cable",
CheckSoftware: "ensure printer software is installed",
CheckInk: "check/replace ink",
CheckPaperJam: "check for paper jam"]
var dt = initDTable[Condition, Action]()
for cond, question in Questions:
dt.addCondition(cond, question)
for act, answer in Answers:
dt.addAction(act, answer)
dt.addRule({}, [CheckPowerCable, CheckPrinterCable, CheckSoftware])
dt.addRule({PrinterPrints}, [CheckSoftware])
dt.addRule({RedLightFlashing}, [CheckPrinterCable, CheckSoftware, CheckInk])
dt.addRule({PrinterRecognized}, [CheckPaperJam])
dt.addRule({PrinterPrints, RedLightFlashing}, [CheckSoftware])
dt.addRule({RedLightFlashing, PrinterRecognized}, [CheckInk, CheckPaperJam])
dt.addRule({PrinterPrints, RedLightFlashing, PrinterRecognized}, [CheckInk])
dt.apply()</syntaxhighlight>
{{out}}
<pre>Answer questions with 'y' or 'n'
Does printer print? n
Does red light is flashing? y
Is printer recognized by computer? y
Actions recommended:
- check/replace ink
- check for paper jam</pre>
=={{header|Perl}}==
<
sub decide($q,$a) {
my @q = @{$q};
my %a = %{$a};
my($cnt,$bit) = (1,0);
for my $prompt (@q) {
print "$prompt: ";
Line 1,256 ⟶ 1,688:
'Printer does not print',
);
my %answers = (
0b00100000 => 'Check the power cable',
Line 1,264 ⟶ 1,697:
);
decide(\@queries,\%answers);</
{{out}}
<pre>Printer is unrecognised: n
Line 1,274 ⟶ 1,707:
Written such that conditions and actions could easily be read from a plain text file,
and should cope fairly well with different lengths, missing/conflicting options, etc.
=== console version ===
<!--<syntaxhighlight lang="phix">-->
<span style="color: #008080;">without</span> <span style="color: #008080;">js</span> <span style="color: #000080;font-style:italic;">-- (wait_key)</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">conditions</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"""
YYYYNNNN:Printer does not print
YYNNYYNN:A red light is flashing
YNYNYNYN:Printer is unrecognized
"""</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">actions</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"""
X-X-X-X-:Ensure printer software is installed
XX--XX--:Check/replace ink
-X-X----:Check for paper jam
"""</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">validate</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">l</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">string</span> <span style="color: #000000;">letters</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">name</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">),</span><span style="color: #000000;">2</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">throw</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"uneven %s pairings"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">name</span><span style="color: #0000FF;">}))</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">by</span> <span style="color: #000000;">2</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">si</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">si</span><span style="color: #0000FF;">)!=</span><span style="color: #000000;">l</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">throw</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"mismatched lengths (line %d)"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">))</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">si</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #008080;">not</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">si</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">],</span><span style="color: #000000;">letters</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">throw</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"invalid letter [%c not in %s]"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">si</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">],</span><span style="color: #000000;">letters</span><span style="color: #0000FF;">}))</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">qa</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">split_any</span><span style="color: #0000FF;">(</span><span style="color: #000000;">conditions</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n:"</span><span style="color: #0000FF;">),</span>
<span style="color: #000000;">sa</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">split_any</span><span style="color: #0000FF;">(</span><span style="color: #000000;">actions</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n:"</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">l</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">qa</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">ask_questions</span><span style="color: #0000FF;">()</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">valid</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">,</span><span style="color: #000000;">l</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">a</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">qa</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">by</span> <span style="color: #000000;">2</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">while</span> <span style="color: #004600;">true</span> <span style="color: #008080;">do</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">qa</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]&</span><span style="color: #008000;">":? "</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">a</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">upper</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">wait_key</span><span style="color: #0000FF;">())</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">a</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"YN"</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\nplease enter Y or N\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%c\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">a</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">l</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">a</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">qa</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">][</span><span style="color: #000000;">j</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span> <span style="color: #000000;">valid</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">false</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">valid</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">show_answers</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">k</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">count</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sa</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">by</span> <span style="color: #000000;">2</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">sa</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">][</span><span style="color: #000000;">k</span><span style="color: #0000FF;">]=</span><span style="color: #008000;">'X'</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">sa</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]&</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">count</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%d answers\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">count</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">try</span>
<span style="color: #000000;">validate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">qa</span><span style="color: #0000FF;">,</span><span style="color: #000000;">l</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"YN"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"condition"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">validate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sa</span><span style="color: #0000FF;">,</span><span style="color: #000000;">l</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"-X"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"action"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">catch</span> <span style="color: #000000;">e</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">e</span>
<span style="color: #7060A8;">abort</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">try</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">valid</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">ask_questions</span><span style="color: #0000FF;">()</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">sv</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sum</span><span style="color: #0000FF;">(</span><span style="color: #000000;">valid</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">sv</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"no answers"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">elsif</span> <span style="color: #000000;">sv</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">show_answers</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">,</span><span style="color: #000000;">valid</span><span style="color: #0000FF;">))</span>
<span style="color: #008080;">else</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"multiple answer sets\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">valid</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">valid</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"for %d:\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">show_answers</span><span style="color: #0000FF;">(</span><span style="color: #000000;">i</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<!--</syntaxhighlight>-->
{{out}}
<pre>
Line 1,370 ⟶ 1,807:
Check/replace ink
2 answers
</pre>
=== GUI version ===
{{libheader|Phix/pGUI}}
<!--<syntaxhighlight lang="phix">(phixonline)-->
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">conditions</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"""
YYYYNNNN:Printer does not print
YYNNYYNN:A red light is flashing
YNYNYNYN:Printer is unrecognized
"""</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">actions</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"""
--X-----:Check the power cable
X-X-----:Check the printer-computer cable
X-X-X-X-:Ensure printer software is installed
XX--XX--:Check/replace ink
-X-X----:Check for paper jam
"""</span>
<span style="color: #008080;">constant</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">qyn</span><span style="color: #0000FF;">,</span><span style="color: #000000;">qus</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">columnize</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">apply</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">split</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">split</span><span style="color: #0000FF;">(</span><span style="color: #000000;">conditions</span><span style="color: #0000FF;">,</span><span style="color: #008000;">'\n'</span><span style="color: #0000FF;">),</span><span style="color: #008000;">':'</span><span style="color: #0000FF;">})),</span>
<span style="color: #0000FF;">{</span><span style="color: #000000;">a_x</span><span style="color: #0000FF;">,</span><span style="color: #000000;">act</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">columnize</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">apply</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">split</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">split</span><span style="color: #0000FF;">(</span><span style="color: #000000;">actions</span><span style="color: #0000FF;">,</span><span style="color: #008000;">'\n'</span><span style="color: #0000FF;">),</span><span style="color: #008000;">':'</span><span style="color: #0000FF;">}))</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">nq</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">qus</span><span style="color: #0000FF;">),</span> <span style="color: #000000;">na</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">act</span><span style="color: #0000FF;">),</span> <span style="color: #000000;">ynl</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">qyn</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])</span>
<span style="color: #7060A8;">assert</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">apply</span><span style="color: #0000FF;">(</span><span style="color: #000000;">qyn</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">)=</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ynl</span><span style="color: #0000FF;">,</span><span style="color: #000000;">nq</span><span style="color: #0000FF;">),</span><span style="color: #008000;">"mismatched YN lengths"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">assert</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">apply</span><span style="color: #0000FF;">(</span><span style="color: #000000;">a_x</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">)=</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ynl</span><span style="color: #0000FF;">,</span><span style="color: #000000;">na</span><span style="color: #0000FF;">),</span><span style="color: #008000;">"mismatched X- lengths"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">assert</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">unique</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">(</span><span style="color: #000000;">qyn</span><span style="color: #0000FF;">,</span><span style="color: #008000;">""</span><span style="color: #0000FF;">))=</span><span style="color: #008000;">"NY"</span> <span style="color: #008080;">and</span> <span style="color: #7060A8;">unique</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">(</span><span style="color: #000000;">a_x</span><span style="color: #0000FF;">,</span><span style="color: #008000;">""</span><span style="color: #0000FF;">))=</span><span style="color: #008000;">"-X"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">title</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"Decision_tables"</span><span style="color: #0000FF;">,</span>
<span style="color: #000000;">help_text</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"""
Check all that apply and press the "Get Answers" button.
"""</span>
<span style="color: #008080;">include</span> <span style="color: #000000;">pGUI</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
<span style="color: #004080;">Ihandle</span> <span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tbox</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">hbox</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">vbox</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">okbtn</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">answers</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">toggles</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">show_help</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">IupMessage</span><span style="color: #0000FF;">(</span><span style="color: #000000;">title</span><span style="color: #0000FF;">,</span><span style="color: #000000;">help_text</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_IGNORE</span> <span style="color: #000080;font-style:italic;">-- (don't open browser help!)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">button_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*okbtn*/</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">valid</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ynl</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">nq</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">yn</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"YN"</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">-</span><span style="color: #7060A8;">IupGetInt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">toggles</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">],</span><span style="color: #008000;">"VALUE"</span><span style="color: #0000FF;">)]</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">ynl</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">yn</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">qyn</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">][</span><span style="color: #000000;">j</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span> <span style="color: #000000;">valid</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">false</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">sv</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sum</span><span style="color: #0000FF;">(</span><span style="color: #000000;">valid</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">answer</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sv</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">?</span><span style="color: #008000;">"no answers"</span><span style="color: #0000FF;">:</span>
<span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sv</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span><span style="color: #0000FF;">?</span><span style="color: #008000;">""</span><span style="color: #0000FF;">:</span><span style="color: #008000;">"multiple answer sets\n"</span><span style="color: #0000FF;">))</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">sv</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">ynl</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">valid</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">sv</span><span style="color: #0000FF;">></span><span style="color: #000000;">1</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">answer</span> <span style="color: #0000FF;">&=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"for %d:\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">actions</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">na</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">a_x</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">][</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]=</span><span style="color: #008000;">'X'</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">actions</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">actions</span><span style="color: #0000FF;">,</span><span style="color: #000000;">act</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">])</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #000000;">actions</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">actions</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%d answers\n"</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">actions</span><span style="color: #0000FF;">)))</span>
<span style="color: #000000;">answer</span> <span style="color: #0000FF;">&=</span> <span style="color: #7060A8;">join</span><span style="color: #0000FF;">(</span><span style="color: #000000;">actions</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #7060A8;">IupSetStrAttribute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">answers</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"TITLE"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">answer</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupSetAttribute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"SIZE"</span><span style="color: #0000FF;">,</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupRefresh</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">key_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*dlg*/</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">atom</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">=</span><span style="color: #004600;">K_ESC</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #004600;">IUP_CLOSE</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span> <span style="color: #000080;font-style:italic;">-- (standard practice for me)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">=</span><span style="color: #004600;">K_F5</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span> <span style="color: #000080;font-style:italic;">-- (let browser reload work)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">=</span><span style="color: #004600;">K_F1</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">show_help</span><span style="color: #0000FF;">()</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">=</span><span style="color: #004600;">K_CR</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">button_cb</span><span style="color: #0000FF;">(</span><span style="color: #000000;">okbtn</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_IGNORE</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #7060A8;">IupOpen</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">toggles</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">apply</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">IupToggle</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">qus</span><span style="color: #0000FF;">,{</span><span style="color: #008000;">"RIGHTBUTTON=YES, CANFOCUS=NO"</span><span style="color: #0000FF;">}})</span>
<span style="color: #000000;">okbtn</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupButton</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Get Answers"</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"button_cb"</span><span style="color: #0000FF;">),</span><span style="color: #008000;">"PADDING=5x5"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">answers</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupLabel</span><span style="color: #0000FF;">(</span><span style="color: #008000;">""</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"EXPAND=BOTH, PADDING=10x10"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">tbox</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupVbox</span><span style="color: #0000FF;">(</span><span style="color: #000000;">toggles</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"ALIGNMENT=ARIGHT"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">hbox</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupHbox</span><span style="color: #0000FF;">({</span><span style="color: #000000;">tbox</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">IupVbox</span><span style="color: #0000FF;">({</span><span style="color: #7060A8;">IupLabel</span><span style="color: #0000FF;">(),</span><span style="color: #000000;">okbtn</span><span style="color: #0000FF;">})})</span>
<span style="color: #000000;">vbox</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupVbox</span><span style="color: #0000FF;">({</span><span style="color: #000000;">hbox</span><span style="color: #0000FF;">,</span><span style="color: #000000;">answers</span><span style="color: #0000FF;">},</span><span style="color: #008000;">"MARGIN=20x10"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">dlg</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupDialog</span><span style="color: #0000FF;">(</span><span style="color: #000000;">vbox</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`TITLE="%s", MINSIZE=540x200`</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">title</span><span style="color: #0000FF;">})</span>
<span style="color: #7060A8;">IupShow</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupSetCallback</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"KEY_CB"</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"key_cb"</span><span style="color: #0000FF;">))</span>
<span style="color: #7060A8;">IupSetAttributeHandle</span><span style="color: #0000FF;">(</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"PARENTDIALOG"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">platform</span><span style="color: #0000FF;">()!=</span><span style="color: #004600;">JS</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">IupMainLoop</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">IupClose</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<!--</syntaxhighlight>-->
=={{header|Picat}}==
===Interactive version===
<syntaxhighlight lang="picat">import util.
%
% Interactive version.
% Answer with YnNn
%
go =>
conditions(Conditions),
solutions(Solutions),
Answers=query(Conditions),
println(join(decision_table(Solutions,Answers),'\n')),
nl.
%
% Query the user about the problem.
% Valid responses: YyNn
%
query(Conditions) = Answers =>
Answers = [0 : _I in 1..Conditions[1,2].length],
println("Please answer the questions with YyNn."),
foreach([Text,Cond] in Conditions)
A = "",
while (not(membchk(A, ["Y","N","y","n"])))
printf("%s? ", Text),
A := read_line(),
if membchk(A,["Y","y"]) then
Answers := map(\/, Answers,Cond)
end
end
end,
nl.
%
% Get the result given the answers (list of 01).
%
decision_table(Solutions,Answers) = Result =>
Result = [],
if sum(Answers) = 0 then
Result := ["Nice, no problem."]
else
foreach([Text,Sol] in Solutions)
if map(/\,Sol,Answers) == Sol then
Result := Result ++ [Text]
end
end
end.
conditions(Conditions) =>
Conditions = [
["Printer does not print", [1,1,1,1,0,0,0,0]],
["A red light is flashing", [1,1,0,0,1,1,0,0]],
["Printer is unrecognised", [1,0,1,0,1,0,1,0]]
].
solutions(Solutions) =>
Solutions = [
["Check the power cable", [0,0,1,0,0,0,0,0]],
["Check the printer-computer cable", [1,0,1,0,0,0,0,0]],
["Ensure printer software is installed",[1,0,1,0,1,0,1,0]],
["Check/replace ink", [1,1,0,0,1,1,0,0]],
["Check for paper jam", [0,1,0,1,0,0,0,0]]
].</syntaxhighlight>
{{out}}
<pre>
Please answer the questions with YyNn.
Printer does not print? y
A red light is flashing? n
Printer is unrecognised? y
Check the power cable
Check the printer-computer cable
Ensure printer software is installed
Check for paper jam</pre>
===All possible answers/combinations===
For debugging purposes it it's nice to be able to print all the possible combinations of answers/solutions.
<syntaxhighlight lang="picat">%
% Go through all combinations of answers
%
go2 =>
PS = power_set([1,2,3]).delete([]).sort(),
println(PS),
conditions(Conditions),
solutions(Solutions),
AllCond = [Cond : [_,Cond] in Conditions],
foreach(P in PS)
println(p=P),
println(conditions=join([Conditions[I].first() : I in P],', ')),
A = [0:_I in 1..Conditions[1,2].length],
foreach(C in [AllCond[I] : I in P])
A := map(\/,A,C)
end,
println(a=A),
println(join(decision_table(Solutions,A),'\n')),
nl
end,
nl.</syntaxhighlight>
{{out}}
(truncated)
<pre>
p = [1]
conditions = Printer does not print
a = [1,1,1,1,0,0,0,0]
Check the power cable
Check the printer-computer cable
Check for paper jam
p = [1,2]
conditions = Printer does not print, A red light is flashing
a = [1,1,1,1,1,1,0,0]
Check the power cable
Check the printer-computer cable
Check/replace ink
Check for paper jam
p = [1,2,3]
conditions = Printer does not print, A red light is flashing, Printer is unrecognised
a = [1,1,1,1,1,1,1,0]
Check the power cable
Check the printer-computer cable
Ensure printer software is installed
Check/replace ink
Check for paper jam
...
</pre>
=={{header|PicoLisp}}==
We allow ourselves a luxurious user interface:
<
(out NIL (prin (car Cond) "? "))
(in NIL
Line 1,383 ⟶ 2,048:
T )
(T (member Reply '(NIL N NO No n no false 0)))
(prinl "Please answer 'Yes' or 'No'") ) ) ) )</
The decision table used in the example:
<
("Printer does not print" T T T T NIL NIL NIL NIL)
("A red light is flashing" T T NIL NIL T T NIL NIL)
Line 1,395 ⟶ 2,060:
("Ensure printer software is installed" T NIL T NIL T NIL T)
("Check/replace ink" T T NIL NIL T T)
("Check for paper jam" NIL T NIL T) )</
The decision can be made directly on the condition and action data, without the need to create intermediate tables:
<
(let Reply (mapcar yes? *Conditions)
(extract and
Line 1,404 ⟶ 2,069:
(unless (pick '((Flg) (<> Flg (next))) Reply)
(rest) ) ) )
(mapcar car *Actions) ) ) )</
Output:
<pre>: (decide)
Line 1,425 ⟶ 2,090:
=={{header|Python}}==
<
'''
Create a Decision table then use it
Line 1,464 ⟶ 2,129:
dt_user(dt)
dt_user(dt)
dt_user(dt)</
'''Sample Run'''
Line 1,515 ⟶ 2,180:
Try this:
Pray!</pre>
=={{header|Quackery}}==
<syntaxhighlight lang="Quackery"> [ say "Check power cable." cr ] is cpc ( --> )
[ say "Check printer-computer cable." cr ] is cpcc ( --> )
[ say "Ensure printer software installed." cr ] is epsi ( --> )
[ say "Check/replace ink." cr ] is cri ( --> )
[ say "Check for paper jam." cr ] is cpj ( --> )
[ say "No problem detected." cr ] is npd ( --> )
[ [ dup $ " (y/n) " join input
dup $ "" = iff drop again ]
nip 0 peek upper char Y = ] is condition ( $ --> b )
[ $ "Does the printer print?"
condition
$ "Is a red light flashing?"
condition
$ "Does the computer recognise the printer?"
condition
1 << | 1 << |
[ table
( n n n ) [ cpc cpcc epsi ]
( y n n ) epsi
( n y n ) [ cpcc epsi cri ]
( y y n ) epsi
( n n y ) cpj
( y n y ) npd
( n y y ) [ cri cpj ]
( y y y ) cri ]
cr do ] is diagnose ( --> )</syntaxhighlight>
{{out}}
As a dialogue in the Quackery shell.
<pre>/O> diagnose
...
Does the printer print? (y/n) n
Is a red light flashing? (y/n) n
Does the computer recognise the printer? (y/n) y
Check for paper jam.
</pre>
=={{header|Racket}}==
Line 1,521 ⟶ 2,231:
I thought it might be fun to merge them.
<
(define (ask-y/n q)
Line 1,608 ⟶ 2,318:
╚═╩════════════╩════════════════════════════════════════════╩═╩═╩═╩═╩═══════╝)
(run-decision-table printer-troubleshooting-2dtable)</
{{out}}
Line 1,620 ⟶ 2,330:
=={{header|Raku}}==
(formerly Perl 6)
<syntaxhighlight lang="raku"
my $bit = 2 ** [+] (1,2,4...*) Z* reverse @q.map: {
so prompt(.value ~ "? ") ~~ /:i ^y/;
Line 1,642 ⟶ 2,352:
);
say '';
}</
A bit of explanation: we pass in two pair lists for the questions and solutions; we ignore the keys of the questions, since they can be
generated by regarding them as a binary counter from right to left, with the least significant bit on the bottom. The <tt>@q.map</tt> runs the prompts and maps them to booleans
Line 1,681 ⟶ 2,391:
::* visual fidelity aids for postmortem analysis (as in logs)
::* a method of allowing the user to quit (opt-out of) the interrogation
<
Q.=; Q.1 = 'Does the printer not print?'
Q.2 = 'Is there a red light flashing on the printer?'
Q.3 = 'Is the printer unrecognized by the software?'
Q.0 = 3 /*the number of questions to be asked. */
action.= /* Y=yes N=no if character isn't a letter = don't care.*/
Line 1,693 ⟶ 2,403:
/* │││ */
/* ↓↓↓ */
action.1 = 'yny' ; pos.1 =
action.2 = 'y.y' ; pos.2 =
action.3 = '..y' ; pos.3 =
action.4 = '.y.' ; pos.4 =
action.5 = 'y.n' ; pos.5 =
do i=1
end /*i*/
say /*display a blank line before questions*/
possible=
do k=1 while action.k\=='' /*filter the answers via decision table*/
do j=1; d= substr(action.k, j, 1); upper d
jm= j//Q.0;
if d==' ' then leave
if \datatype(d, 'U') then iterate
if d\==ans.jm then iterate k
end /*j*/
say pos.k /*this could be a possible solution. */
possible= possible +
end /*k*/
if possible==0 then say '
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
asker: arg ?; oops= 0;
howTo = '(You can answer with a Yes or No [or Quit])'
do forever
if oops then do; say; say right(howTo, 79); say; oops=
end
if
if
say 'invalid response: ' x; oops= 1
end /*forever*/</syntaxhighlight>
{{out|output|text= (a screen scraping using a DOS prompt window for some of the possible responses):}}
('''decision.rex''' is the name of the REXX program that produced this output.)
<pre style="height:72ex">
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
no ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
No ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
n ◄■■■■■■■■ user input.
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
n ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
n ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
yes ◄■■■■■■■■ user input.
═════════ Ensure printer software is installed.
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
n ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
Ye ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
n ◄■■■■■■■■ user input.
═════════ Check/replace ink.
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
n ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
yes. ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
yes ◄■■■■■■■■ user input.
═════════ Ensure printer software is installed.
═════════ Check/replace ink.
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
y ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
no ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
no ◄■■■■■■■■ user input.
═════════ Check for paper jam.
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
y ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
n ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
y ◄■■■■■■■■ user input.
═════════ Check the power cable.
═════════ check the printer-computer cable.
═════════ Ensure printer software is installed.
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
y ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
y ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
n ◄■■■■■■■■ user input.
═════════ Check/replace ink.
═════════ Check for paper jam.
D:\►rexx decision
───────── (question 1 of 3) Does the printer not print?
y ◄■■■■■■■■ user input.
───────── (question 2 of 3) Is there a red light flashing on the printer?
y ◄■■■■■■■■ user input.
───────── (question 3 of 3) Is the printer unrecognized by the software?
y ◄■■■■■■■■ user input.
═════════ check the printer-computer cable.
═════════ Ensure printer software is installed.
═════════ Check/replace ink.
D:\►
Line 1,825 ⟶ 2,537:
=={{header|Ring}}==
<
# Project : Decision tables
Line 1,860 ⟶ 2,572:
see "invalid input: " + upper(notprinting) + " " + upper(flashing) + " " + upper(notrecognized) + nl
ok
</syntaxhighlight>
Output:
<pre>
Line 1,872 ⟶ 2,584:
=={{header|Ruby}}==
<
def initialize(conditions, actions)
@conditions = conditions
Line 1,924 ⟶ 2,636:
]
)
loop {dt.run}</
Example
Line 1,991 ⟶ 2,703:
=={{header|Scala}}==
{{trans|Java}}
<
import scala.util.control.Breaks
Line 2,066 ⟶ 2,778:
}
}
}</
{{out}}
<pre>Please answer the following questions with a y or n:
Line 2,078 ⟶ 2,790:
=={{header|Sidef}}==
{{trans|Raku}}
<
var bits = q.map { |p|
Line 2,113 ⟶ 2,825:
)
say ''
}</
{{out}}
<pre>
Line 2,142 ⟶ 2,854:
=={{header|Tcl}}==
<
#http://rosettacode.org/wiki/Keyboard_Input/Obtain_a_Y_or_N_response#Tcl
Line 2,181 ⟶ 2,893:
}
}
}</
Demonstration:
<
"Printer does not print"
"A red light is flashing"
Line 2,194 ⟶ 2,906:
"Check for paper jam" {0 1 0 1}
}
printerDiagnosisTable consult</
Output:
<pre>
Line 2,202 ⟶ 2,914:
Ensure printer software is installed
Check/replace ink
</pre>
=={{header|Wren}}==
{{trans|Kotlin}}
{{libheader|Wren-str}}
<syntaxhighlight lang="wren">import "io" for Stdin, Stdout
import "./str" for Str
var conditions = [
["Printer prints" , "NNNNYYYY"],
["A red light is flashing" , "YYNNYYNN"],
["Printer is recognized by computer", "NYNYNYNY"]
]
var actions = [
["Check the power cable" , "NNYNNNNN"],
["Check the printer-computer cable" , "YNYNNNNN"],
["Ensure printer software is installed", "YNYNYNYN"],
["Check/replace ink" , "YYNNNYNN"],
["Check for paper jam" , "NYNYNNNN"]
]
var nc = conditions.count
var na = actions.count
var nr = conditions[0][1].count // number of rules
var np = 7 // index of 'no problem' rule
System.print("Please answer the following questions with a y or n:")
var answers = List.filled(nc, false)
for (c in 0...nc) {
var input
while (true) {
System.write(" %(conditions[c][0]) ? ")
Stdout.flush()
input = Str.upper(Stdin.readLine())
if (input == "Y" || input == "N") break
}
answers[c] = (input == "Y")
}
System.print("\nRecommended action(s):")
for (r in 0...nr) {
var outer = false
for (c in 0...nc) {
var yn = answers[c] ? "Y" : "N"
if (conditions[c][1][r] != yn) {
outer = true
break
}
}
if (!outer) {
if (r == np) {
System.print(" None (no problem detected)")
} else {
for (a in 0...na) {
if (actions[a][1][r] == "Y") System.print(" %(actions[a][0])")
}
}
break
}
}</syntaxhighlight>
{{out}}
Sample input/output:
<pre>
Please answer the following questions with a y or n:
Printer prints ? n
A red light is flashing ? n
Printer is recognized by computer ? n
Recommended action(s):
Check the power cable
Check the printer-computer cable
Ensure printer software is installed
</pre>
=={{header|XPL0}}==
{{trans|Wren}}
<syntaxhighlight lang "XPL0">include xpllib; \for ToUpper, Print
int Conditions, Actions, NC, NA, NR, NP, Answers(3), Input, Outer, YN, R, C, A;
char S;
[Conditions:= [
["Printer prints" , "NNNNYYYY"],
["A red light is flashing" , "YYNNYYNN"],
["Printer is recognized by computer", "NYNYNYNY"]
];
Actions:= [
["Check the power cable" , "NNYNNNNN"],
["Check the printer-computer cable" , "YNYNNNNN"],
["Ensure printer software is installed", "YNYNYNYN"],
["Check/replace ink" , "YYNNNYNN"],
["Check for paper jam" , "NYNYNNNN"]
];
NC:= 3;
NA:= 5;
NR:= 8; \number of rules
NP:= 7; \index of 'no problem' rule
Print("Please answer the following questions with a y or n:\n");
for C:= 0 to NC-1 do
[loop [Print(" %s ? ", Conditions(C,0));
OpenI(0);
Input:= ToUpper(ChIn(0));
if Input = ^Y or Input = ^N then quit;
];
Answers(C):= Input = ^Y;
];
Print("\nRecommended action(s):\n");
for R:= 0 to NR-1 do
[Outer:= false;
for C:= 0 to NC-1 do
[YN:= if Answers(C) then ^Y else ^N;
S:= Conditions(C,1); \to access character bytes not integers
if S(R) # YN then
[Outer:= true;
C:= NC; \break
];
];
if not Outer then
[if R = NP then
Print(" None (no problem detected)\n")
else [for A:= 0 to NA-1 do
[S:= Actions(A,1);
if S(R) = ^Y then
Print(" %s\n", Actions(A,0));
];
];
R:= NR; \break
];
];
]</syntaxhighlight>
{{out}}
<pre>
Please answer the following questions with a y or n:
Printer prints ? n
A red light is flashing ? n
Printer is recognized by computer ? n
Recommended action(s):
Check the power cable
Check the printer-computer cable
Ensure printer software is installed
</pre>
|