Decision tables: Difference between revisions

=={{header|Kotlin}}==

<lang scala>// version 1.1.51

val conditions = listOf(

"Printer prints" to "NNNNYYYY",

"A red light is flashing" to "YYNNYYNN",

"Printer is recognized by computer" to "NYNYNYNY"

)

val actions = listOf(

"Check the power cable" to "NNYNNNNN",

"Check the printer-computer cable" to "YNYNNNNN",

"Ensure printer software is installed" to "YNYNYNYN",

"Check/replace ink" to "YYNNNYNN",

"Check for paper jam" to "NYNYNNNN"

)

fun main(args: Array<String>) {

val nc = conditions.size

val na = actions.size

val nr = conditions[0].second.length // number of rules

val np = 7 // index of 'no problem' rule

println("Please answer the following questions with a y or n:")

val answers = BooleanArray(nc)

for (c in 0 until nc) {

var input: String

do {

print(" ${conditions[c].first} ? ")

input = readLine()!!.toUpperCase()

}

while (input != "Y" && input != "N")

answers[c] = (input == "Y")

}

println("\nRecommended action(s):")

outer@ for (r in 0 until nr) {

for (c in 0 until nc) {

val yn = if (answers[c]) 'Y' else 'N'

if (conditions[c].second[r] != yn) continue@outer

}

if (r == np) {

println(" None (no problem detected)")

}

else {

for (a in 0 until na) {

if (actions[a].second[r] == 'Y') println(" ${actions[a].first}")

}

}

return

}

}</lang>

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>