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{{task}}
[[File:ship'sBell.jpg|650px||right]]
[[Category: Date and time]]
;Task
Write a small program that emulates a [[wp:Ship's bell#Timing_of_duty_periods|nautical bell]] producing a ringing bell pattern at certain times throughout the day.
The bell timing should be in accordance with [[wp:GMT|Greenwich Mean Time]], unless locale dictates otherwise.
It is permissible for the program to [[Run as a daemon or service|daemonize]], or to slave off a scheduler, and it is permissible to use alternative notification methods (such as producing a written notice "Two Bells Gone"), if these are more usual for the system type.
;Related task:
* [[Sleep]]
<br><br>
=={{header|AppleScript}}==
===Continuous repeat===
This version uses local time and speaks the bell rings using OS X's built-in speech synthesizer.
<syntaxhighlight lang="applescript">repeat
set {hours:h, minutes:m} to (current date)
if {0, 30} contains m then
set bells to (h mod 4) * 2 + (m div 30)
if bells is 0 then set bells to 4
set pairs to bells div 2
repeat pairs times
say "ding dong" using "Bells"
end repeat
if (bells mod 2) is 1 then
say "dong" using "Bells"
end if
end if
delay 60
end repeat</syntaxhighlight>
==='idle' handler===
For actions which are to be carried out at set intervals throughout the day, it's more usual to use a stay-open script applet with an 'idle' handler. When such an applet's launched, it sits there mostly doing nothing until it receives an 'idle' command from the system, whereupon it performs the actions in its 'idle' handler. If this handler returns a positive number (or something that can be interpreted as one), the system takes this as the number of seconds to wait before sending another 'idle' command to the applet. Otherwise the default is thirty seconds. This hogs the processor far less than having the script run on a continuous repeat. Unfortunately, depending on how busy the computer is at the time, 'idle' calls may be slightly delayed, so any time checks performed by the handler have to allow for this.
<syntaxhighlight lang="applescript">use AppleScript version "2.4" -- OS X 10.10 (Yosemite) or later
use framework "Foundation"
use scripting additions
property soundName : "Glass" -- The nearest system sound to a bell!
property leeway : 8 -- Number of seconds either side of the sounding time in which the bells are allowed to start.
property postNoreBritish : true -- 1, 2, 3, and 8 bells during last dog watch?
property halfHour : 30 * minutes
on idle
local m, d, t, elapsed, bells, bellSound
-- Get the month, day, and time (in seconds) of the current GMT date, shifted forward by 'leeway' seconds.
set {month:m, day:d, time:t} to (current date) + (leeway - (time to GMT))
-- How far is this into a half-hour?
set elapsed to t mod halfHour
-- If too far, just reset the idle and don't sound this time.
if (elapsed mod halfHour > 2 * leeway) then return halfHour - (elapsed - leeway)
-- Otherwise work out how many bells are required and sound them.
if ((t < halfHour) and (d is 1) and (month is January)) then
set bells to 16 -- New Year.
else
set bells to (t mod (4 * hours) div halfHour + 7) mod 8 + 1
if ((postNoreBritish) and (t > 18 * hours) and (t < 20 * hours)) then set bells to bells - 4
end if
set bellSound to current application's class "NSSound"'s soundNamed:(soundName)
repeat (bells div 2) times
repeat 2 times
tell bellSound to play()
delay 0.7
tell bellSound to |stop|()
end repeat
delay 1
end repeat
repeat bells mod 2 times
tell bellSound to play()
delay 0.7
tell bellSound to |stop|()
end repeat
-- Request another call in half an hour's time, less however long the above took.
return halfHour - (time of (current date)) mod halfHour
end idle</syntaxhighlight>
=={{header|AutoHotkey}}==
<syntaxhighlight lang="autohotkey">NauticalBell(hh, mm){
Hr := 0, min := 30, Bells := [], pattern := []
Loop 8 ; genrate 8 patterns
{
num := A_Index , code := ""
while (num/2 >=1)
code .= "** ", num := num-2
code .= mod(A_Index, 2) ? "*" : ""
pattern[A_Index] := code
}
loop, 48 ; 24 hours * 2 for every half an hour
{
numBells := !mod(A_Index, 8) ? 8 : mod(A_Index, 8) , min := 30
if !Mod(A_Index, 2)
hr++ , min := 00
Bells[SubStr("0" hr, -1) ":" min] := numBells
}
Bells[00 ":" 00] := Bells[24 ":" 00] , numBells := Bells[hh ":" mm]
return {"bells": numBells, "pattern": Pattern[numBells]}
}</syntaxhighlight>
Example:<syntaxhighlight lang="autohotkey">res := ""
loop, 24
{
hr := SubStr("0" A_Index -1, -1)
Loop 60
{
min := SubStr("0" A_Index -1, -1)
if (min = 0 || min = 30)
res .= hr ":" min "`t" NauticalBell(hr, min).bells "`t" NauticalBell(hr, min).pattern "`n"
}
}
MsgBox, 262144, , % "Time`tBells`tPattern`n" res
return</syntaxhighlight>
Outputs:<pre>Time Bells Pattern
00:00 8 ** ** ** **
00:30 1 *
01:00 2 **
01:30 3 ** *
02:00 4 ** **
02:30 5 ** ** *
03:00 6 ** ** **
03:30 7 ** ** ** *
04:00 8 ** ** ** **
04:30 1 *
05:00 2 **
05:30 3 ** *
06:00 4 ** **
06:30 5 ** ** *
07:00 6 ** ** **
07:30 7 ** ** ** *
08:00 8 ** ** ** **
08:30 1 *
09:00 2 **
09:30 3 ** *
10:00 4 ** **
10:30 5 ** ** *
11:00 6 ** ** **
11:30 7 ** ** ** *
12:00 8 ** ** ** **
12:30 1 *
13:00 2 **
13:30 3 ** *
14:00 4 ** **
14:30 5 ** ** *
15:00 6 ** ** **
15:30 7 ** ** ** *
16:00 8 ** ** ** **
16:30 1 *
17:00 2 **
17:30 3 ** *
18:00 4 ** **
18:30 5 ** ** *
19:00 6 ** ** **
19:30 7 ** ** ** *
20:00 8 ** ** ** **
20:30 1 *
21:00 2 **
21:30 3 ** *
22:00 4 ** **
22:30 5 ** ** *
23:00 6 ** ** **
23:30 7 ** ** ** *</pre>
Alternatively, you could remove the forever loop and set it up to run every half hour via launchd or cron.
=={{header|AWK}}==
<syntaxhighlight lang="awk">
# syntax: GAWK -f NAUTICAL_BELL.AWK
BEGIN {
# sleep_cmd = "sleep 55s" # Unix
sleep_cmd = "TIMEOUT /T 55 >NUL" # MS-Windows
split("Middle,Morning,Forenoon,Afternoon,Dog,First",watch_arr,",")
split("One,Two,Three,Four,Five,Six,Seven,Eight",bells_arr,",")
simulate1day()
while (1) {
t = systime()
h = strftime("%H",t) + 0
m = strftime("%M",t) + 0
if (m == 0 || m == 30) {
nb(h,m)
while (systime() < t + 5) {}
}
system(sleep_cmd)
}
exit(0)
}
function nb(h,m, bells,hhmm,plural,sounds,watch) {
# hhmm = sprintf("%02d:%02d",h,m)
# if (hhmm == "00:00") { watch = 6 }
# else if (hhmm <= "04:00") { watch = 1 }
# else if (hhmm <= "08:00") { watch = 2 }
# else if (hhmm <= "12:00") { watch = 3 }
# else if (hhmm <= "16:00") { watch = 4 }
# else if (hhmm <= "20:00") { watch = 5 }
# else { watch = 6}
# determining watch: verbose & readable (above) vs. terse & cryptic (below)
watch = 60 * h + m
watch = (watch < 1 ) ? 6 : int((watch - 1) / 240 + 1)
bells = (h % 4) * 2 + int(m / 30)
if (bells == 0) { bells = 8 }
plural = (bells == 1) ? " " : "s"
sounds = strdup("\x07",bells)
printf("%02d:%02d %9s watch %5s bell%s %s\n",h,m,watch_arr[watch],bells_arr[bells],plural,sounds)
}
function simulate1day( h,m) {
for (h=0; h<=23; h++) {
for (m=0; m<=59; m+=30) {
nb(h,m)
}
}
}
function strdup(str,n, i,new_str) {
for (i=1; i<=n; i++) {
new_str = new_str str
}
gsub(str str,"& ",new_str)
return(new_str)
}
</syntaxhighlight>
<p>Output:</p>
<pre>
00:00 First watch Eight bells ␇␇ ␇␇ ␇␇ ␇␇
00:30 Middle watch One bell ␇
01:00 Middle watch Two bells ␇␇
01:30 Middle watch Three bells ␇␇ ␇
02:00 Middle watch Four bells ␇␇ ␇␇
02:30 Middle watch Five bells ␇␇ ␇␇ ␇
03:00 Middle watch Six bells ␇␇ ␇␇ ␇␇
03:30 Middle watch Seven bells ␇␇ ␇␇ ␇␇ ␇
04:00 Middle watch Eight bells ␇␇ ␇␇ ␇␇ ␇␇
04:30 Morning watch One bell ␇
05:00 Morning watch Two bells ␇␇
05:30 Morning watch Three bells ␇␇ ␇
06:00 Morning watch Four bells ␇␇ ␇␇
06:30 Morning watch Five bells ␇␇ ␇␇ ␇
07:00 Morning watch Six bells ␇␇ ␇␇ ␇␇
07:30 Morning watch Seven bells ␇␇ ␇␇ ␇␇ ␇
08:00 Morning watch Eight bells ␇␇ ␇␇ ␇␇ ␇␇
08:30 Forenoon watch One bell ␇
09:00 Forenoon watch Two bells ␇␇
09:30 Forenoon watch Three bells ␇␇ ␇
10:00 Forenoon watch Four bells ␇␇ ␇␇
10:30 Forenoon watch Five bells ␇␇ ␇␇ ␇
11:00 Forenoon watch Six bells ␇␇ ␇␇ ␇␇
11:30 Forenoon watch Seven bells ␇␇ ␇␇ ␇␇ ␇
12:00 Forenoon watch Eight bells ␇␇ ␇␇ ␇␇ ␇␇
12:30 Afternoon watch One bell ␇
13:00 Afternoon watch Two bells ␇␇
13:30 Afternoon watch Three bells ␇␇ ␇
14:00 Afternoon watch Four bells ␇␇ ␇␇
14:30 Afternoon watch Five bells ␇␇ ␇␇ ␇
15:00 Afternoon watch Six bells ␇␇ ␇␇ ␇␇
15:30 Afternoon watch Seven bells ␇␇ ␇␇ ␇␇ ␇
16:00 Afternoon watch Eight bells ␇␇ ␇␇ ␇␇ ␇␇
16:30 Dog watch One bell ␇
17:00 Dog watch Two bells ␇␇
17:30 Dog watch Three bells ␇␇ ␇
18:00 Dog watch Four bells ␇␇ ␇␇
18:30 Dog watch Five bells ␇␇ ␇␇ ␇
19:00 Dog watch Six bells ␇␇ ␇␇ ␇␇
19:30 Dog watch Seven bells ␇␇ ␇␇ ␇␇ ␇
20:00 Dog watch Eight bells ␇␇ ␇␇ ␇␇ ␇␇
20:30 First watch One bell ␇
21:00 First watch Two bells ␇␇
21:30 First watch Three bells ␇␇ ␇
22:00 First watch Four bells ␇␇ ␇␇
22:30 First watch Five bells ␇␇ ␇␇ ␇
23:00 First watch Six bells ␇␇ ␇␇ ␇␇
23:30 First watch Seven bells ␇␇ ␇␇ ␇␇ ␇
</pre>
=={{header|C}}==
Implementation corrected, sounds the system bell as per nautical standards, sounds bell as per local system time.
<syntaxhighlight lang="c">
#include<unistd.h>
#include<stdio.h>
#include<time.h>
#define SHORTLAG 1000
#define LONGLAG 2000
int main(){
int i,times,hour,min,sec,min1,min2;
time_t t;
struct tm* currentTime;
while(1){
time(&t);
currentTime = localtime(&t);
hour = currentTime->tm_hour;
min = currentTime->tm_min;
sec = currentTime->tm_sec;
hour = 12;
min = 0;
sec = 0;
if((min==0 || min==30) && sec==0)
times = ((hour*60 + min)%240)%8;
if(times==0){
times = 8;
}
if(min==0){
min1 = 0;
min2 = 0;
}
else{
min1 = 3;
min2 = 0;
}
if((min==0 || min==30) && sec==0){
printf("\nIt is now %d:%d%d %s. Sounding the bell %d times.",hour,min1,min2,(hour>11)?"PM":"AM",times);
for(i=1;i<=times;i++){
printf("\a");
(i%2==0)?sleep(LONGLAG):sleep(SHORTLAG);
}
}
}
return 0;
}
</syntaxhighlight>
=={{header|C++}}==
This version uses local time.
<syntaxhighlight lang="cpp">
#include <iostream>
#include <string>
#include <windows.h>
//--------------------------------------------------------------------------------------------------
using namespace std;
//--------------------------------------------------------------------------------------------------
class bells
{
public:
void start()
{
watch[0] = "Middle"; watch[1] = "Morning"; watch[2] = "Forenoon"; watch[3] = "Afternoon"; watch[4] = "Dog"; watch[5] = "First";
count[0] = "One"; count[1] = "Two"; count[2] = "Three"; count[3] = "Four"; count[4] = "Five"; count[5] = "Six"; count[6] = "Seven"; count[7] = "Eight";
_inst = this; CreateThread( NULL, 0, bell, NULL, 0, NULL );
}
private:
static DWORD WINAPI bell( LPVOID p )
{
DWORD wait = _inst->waitTime();
while( true )
{
Sleep( wait );
_inst->playBell();
wait = _inst->waitTime();
}
return 0;
}
DWORD waitTime()
{
GetLocalTime( &st );
int m = st.wMinute >= 30 ? st.wMinute - 30 : st.wMinute;
return( 1800000 - ( ( m * 60 + st.wSecond ) * 1000 + st.wMilliseconds ) );
}
void playBell()
{
GetLocalTime( &st );
int b = ( 2 * st.wHour + st.wMinute / 30 ) % 8; b = b == 0 ? 8 : b;
int w = ( 60 * st.wHour + st.wMinute );
if( w < 1 ) w = 5; else w = ( w - 1 ) / 240;
char hr[32]; wsprintf( hr, "%.2d:%.2d", st.wHour, st.wMinute );
cout << hr << " - " << watch[w] << " watch - " << count[b - 1] << " Bell";
if( b > 1 ) cout << "s"; else cout << " "; cout << " Gone." << endl;
for( int x = 0, c = 1; x < b; x++, c++ )
{
cout << "\7"; Sleep( 500 );
if( !( c % 2 ) ) Sleep( 300 );
}
}
SYSTEMTIME st;
string watch[7], count[8];
static bells* _inst;
};
//--------------------------------------------------------------------------------------------------
bells* bells::_inst = 0;
//--------------------------------------------------------------------------------------------------
int main( int argc, char* argv[] )
{
bells b; b.start();
while( 1 ); // <- runs forever!
return 0;
}
//--------------------------------------------------------------------------------------------------
</syntaxhighlight>
Output:
<pre>
00:00 - First watch - Eight Bells Gone.
00:30 - Middle watch - One Bell Gone.
01:00 - Middle watch - Two Bells Gone.
01:30 - Middle watch - Three Bells Gone.
02:00 - Middle watch - Four Bells Gone.
02:30 - Middle watch - Five Bells Gone.
03:00 - Middle watch - Six Bells Gone.
03:30 - Middle watch - Seven Bells Gone.
04:00 - Middle watch - Eight Bells Gone.
04:30 - Morning watch - One Bell Gone.
05:00 - Morning watch - Two Bells Gone.
05:30 - Morning watch - Three Bells Gone.
06:00 - Morning watch - Four Bells Gone.
06:30 - Morning watch - Five Bells Gone.
07:00 - Morning watch - Six Bells Gone.
07:30 - Morning watch - Seven Bells Gone.
08:00 - Morning watch - Eight Bells Gone.
08:30 - Forenoon watch - One Bell Gone.
09:00 - Forenoon watch - Two Bells Gone.
09:30 - Forenoon watch - Three Bells Gone.
10:00 - Forenoon watch - Four Bells Gone.
10:30 - Forenoon watch - Five Bells Gone.
11:00 - Forenoon watch - Six Bells Gone.
11:30 - Forenoon watch - Seven Bells Gone.
12:00 - Forenoon watch - Eight Bells Gone.
12:30 - Afternoon watch - One Bell Gone.
13:00 - Afternoon watch - Two Bells Gone.
13:30 - Afternoon watch - Three Bells Gone.
14:00 - Afternoon watch - Four Bells Gone.
14:30 - Afternoon watch - Five Bells Gone.
15:00 - Afternoon watch - Six Bells Gone.
15:30 - Afternoon watch - Seven Bells Gone.
16:00 - Afternoon watch - Eight Bells Gone.
16:30 - Dog watch - One Bell Gone.
17:00 - Dog watch - Two Bells Gone.
17:30 - Dog watch - Three Bells Gone.
18:00 - Dog watch - Four Bells Gone.
18:30 - Dog watch - Five Bells Gone.
19:00 - Dog watch - Six Bells Gone.
19:30 - Dog watch - Seven Bells Gone.
20:00 - Dog watch - Eight Bells Gone.
20:30 - First watch - One Bell Gone.
21:00 - First watch - Two Bells Gone.
21:30 - First watch - Three Bells Gone.
22:00 - First watch - Four Bells Gone.
22:30 - First watch - Five Bells Gone.
23:00 - First watch - Six Bells Gone.
23:30 - First watch - Seven Bells Gone.
</pre>
=={{header|D}}==
This code uses local time instead of Greenwich Mean Time.
<
class NauticalBell : Thread {
Line 57 ⟶ 516:
writeln(e.msg);
}
}</
This output is from an actual test run.
<pre>
Line 109 ⟶ 568:
09:00:00 : 2 bells</pre>
<syntaxhighlight lang="freebasic">Dim As Byte m = 0
For n As Byte = 0 To 23
If n = 23 Then
Print " 23" + ":30" + " = " + "7 bells"
Else
m += 1
Print ""; n Mod 23; ":30"; " ="; m; " bells"
End If
If n = 23 Then
Print " 00" + ":00" + " = " + "8 bells"
Else
m += 1
Print ""; (n Mod 23+1); ":00"; " ="; m; " bells"
If m = 8 Then m = 0
End If
Next n
Sleep</syntaxhighlight>
=={{header|FreeBASIC}}==
{{trans|Ring}}
<syntaxhighlight lang="vb">Dim As Byte m = 0
For n As Byte = 0 To 23
If n = 23 Then
Print " 23" + ":30" + " = " + "7 bells"
Else
m += 1
Print ""; n Mod 23; ":30"; " ="; m; " bells"
End If
If n = 23 Then
Print " 00" + ":00" + " = " + "8 bells"
Else
m += 1
Print ""; (n Mod 23+1); ":00"; " ="; m; " bells"
If m = 8 Then m = 0
End If
Next n
Sleep</syntaxhighlight>
=={{header|Go}}==
Provided your terminal bell is enabled, this should beep an appropriate number of times before displaying its output. It uses local time.
<syntaxhighlight lang="go">package main
import (
"fmt"
"strings"
"time"
)
func main() {
watches := []string{
"First", "Middle", "Morning", "Forenoon",
"Afternoon", "Dog", "First",
}
for {
t := time.Now()
h := t.Hour()
m := t.Minute()
s := t.Second()
if (m == 0 || m == 30) && s == 0 {
bell := 0
if m == 30 {
bell = 1
}
bells := (h*2 + bell) % 8
watch := h/4 + 1
if bells == 0 {
bells = 8
watch--
}
sound := strings.Repeat("\a", bells)
pl := "s"
if bells == 1 {
pl = " "
}
w := watches[watch] + " watch"
if watch == 5 {
if bells < 5 {
w = "First " + w
} else {
w = "Last " + w
}
}
fmt.Printf("%s%02d:%02d = %d bell%s : %s\n", sound, h, m, bells, pl, w)
}
time.Sleep(1 * time.Second)
}
}</syntaxhighlight>
{{out}}
Abbreviated output:
<pre>
...
15:30 = 7 bells : Afternoon watch
16:00 = 8 bells : Afternoon watch
16:30 = 1 bell : First Dog watch
17:00 = 2 bells : First Dog watch
...
</pre>
=={{header|Haskell}}==
This solution first creates a general way of scheduling tasks on a time interval, and then schedules a "ringing" task. If used in a terminal it will also produce noise. Local time is used.
<syntaxhighlight lang="haskell">
import Control.Concurrent
import Control.Monad
import Data.Time
import Text.Printf
type Microsecond = Int
type Scheduler = TimeOfDay -> Microsecond
-- Scheduling
--------------
getTime :: TimeZone -> IO TimeOfDay
getTime tz = do
t <- getCurrentTime
return $ localTimeOfDay $ utcToLocalTime tz t
getGMTTime = getTime utc
getLocalTime = getCurrentTimeZone >>= getTime
-- Returns the difference between 'y' and the closest higher multiple of 'x'
nextInterval x y
| x > y = x - y
| mod y x > 0 = x - mod y x
| otherwise = 0
-- Given a interval in seconds, this function returns time delta in microseconds.
onInterval :: Int -> Scheduler
onInterval interval time = toNext dMS
where
toNext = nextInterval (1000000 * interval)
tDelta = timeOfDayToTime time
dMS = truncate $ 1000000 * tDelta
doWithScheduler :: Scheduler -> (Int -> IO ()) -> IO ThreadId
doWithScheduler sched task = forkIO $ forM_ [0..] exec
where
exec n = do
t <- getLocalTime
threadDelay $ sched t
task n
-- Output
---------
watchNames = words "Middle Morning Forenoon Afternoon Dog First"
countWords = words "One Two Three Four Five Six Seven Eight"
-- Executes IO action and then waits for n microseconds
postDelay n fn = fn >> threadDelay n
termBell = putStr "\a"
termBells n = replicateM_ n $ postDelay 100000 termBell
termBellSeq seq = forM_ seq $ postDelay 500000 . termBells
toNoteGlyph 1 = "♪"
toNoteGlyph 2 = "♫"
toNoteGlyph _ = ""
ringBells :: Int -> IO ()
ringBells n = do
t <- getLocalTime
let numBells = 1 + (mod n 8)
watch = watchNames!!(mod (div n 8) 8)
count = countWords!!(numBells - 1)
(twos,ones) = quotRem numBells 2
pattern = (replicate twos 2) ++ (replicate ones 1)
notes = unwords $ map toNoteGlyph pattern
plural = if numBells > 1 then "s" else ""
strFMT = show t ++ ": %s watch, %5s bell%s: " ++ notes ++ "\n"
printf strFMT watch count plural
termBellSeq pattern
-- Usage
---------
bellRinger :: IO ThreadId
bellRinger = doWithScheduler (onInterval (30*60)) ringBells
</syntaxhighlight>
{{out}}
<pre>
12:30 Afternoon watch, One bell: ♪
13:00 Afternoon watch, Two bells: ♫
13:30 Afternoon watch, Three bells: ♫ ♪
14:00 Afternoon watch, Four bells: ♫ ♫
14:30 Afternoon watch, Five bells: ♫ ♫ ♪
</pre>
=={{header|J}}==
{{trans|Raku}}
'''Solution''':<syntaxhighlight lang="j">require 'strings printf'
WATCH =: <;._1 ' Middle Morning Forenoon Afternoon Dog First'
ORDINAL =: <;._1 ' One Two Three Four Five Six Seven Eight'
BELL =: 7{a. NB. Terminal bell code (\a or ^G)
time =: 6!:0
sleep =: 6!:3
print =: ucp 1!:2 4:
shipsWatch =: verb define
PREV_MARK =. _1 _1
while. do. NB. Loop forever
now =. 3 4 { time '' NB. Current hour & minute
NB. If we just flipped over to a new half-hour mark
if. (0 30 e.~ {: now) > now -: PREV_MARK do.
PREV_MARK =. now
'allsWell notes'=.callWatch now
print allsWell
(ringBell"0~ -@# {. 2|#) notes
print CRLF
end.
sleep 15.0
end.
)
callWatch =: verb define
'watch bells' =. clock2ship y
NB. Plural for 0~:bells ordinals are origin-1, not origin-0
NB. (and similarly 1+bells for notes).
fields=.(0{y);(1{y);(watch{::WATCH);(bells{::ORDINAL);('s'#~0~:bells)
notes =. ; (0 2#:1+bells) #&.> u:16b266b 16b266a NB. ♫♪
notes ;~ '%02d:%02d %s watch, %s Bell%s Gone: \t' sprintf fields
)
clock2ship =: verb define"1
NB. Convert from "24 hours of 60 minutes" to
NB. "6 watches of 8 bells", and move midnight
NB. from index-origin 0 (0 hrs, 0 minutes)
NB. index-origin 1 (0 watches, 1 bell).
6 8 #: 48 | _1 + 24 2 #. (, (30-1)&I.)/ y
)
ringBell =: dyad define
print BELL,y
NB. x indicates two rings (0) or just one (1)
if. 0=x do.
sleep 0.75
print BELL
sleep 0.25
else.
sleep 1.0
end.
y
)</syntaxhighlight>
'''Examples''': Invoke <tt>shipsWatch 0</tt>; the output is identical to Raku's.
'''Notes''': I tested the <tt>clock2ship</tt>, <tt>callWatch</tt>, and <tt>ringBell</tt> functions, but didn't actually have the patience to test <tt>shipsWatch</tt> over a 24-hour period. Use at your own risk (but don't use it to keep watch on your galleon, please).
=={{header|Java}}==
This code uses UTC time.
{{trans|D}}
<syntaxhighlight lang="java">import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
public class NauticalBell extends Thread {
public static void main(String[] args) {
NauticalBell bells = new NauticalBell();
bells.setDaemon(true);
bells.start();
try {
bells.join();
} catch (InterruptedException e) {
System.out.println(e);
}
}
@Override
public void run() {
DateFormat sdf = new SimpleDateFormat("HH:mm:ss");
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
int numBells = 0;
long time = System.currentTimeMillis();
long next = time - (time % (24 * 60 * 60 * 1000)); // midnight
while (next < time) {
next += 30 * 60 * 1000; // 30 minutes
numBells = 1 + (numBells % 8);
}
while (true) {
long wait = 100L;
time = System.currentTimeMillis();
if (time - next >= 0) {
String bells = numBells == 1 ? "bell" : "bells";
String timeString = sdf.format(time);
System.out.printf("%s : %d %s\n", timeString, numBells, bells);
next += 30 * 60 * 1000;
wait = next - time;
numBells = 1 + (numBells % 8);
}
try {
Thread.sleep(wait);
} catch (InterruptedException e) {
return;
}
}
}
}</syntaxhighlight>
Sample output:
<pre>...
13:00:00 : 2 bells
13:30:00 : 3 bells
14:00:00 : 4 bells
...</pre>
=={{header|Julia}}==
<syntaxhighlight lang="julia">using Dates
"""
nauticalbells(DateTime)
Return a string according to the "simpler system" of nautical bells
listed in the table in Wikipedia at
en.wikipedia.org/wiki/Ship%27s_bell#Simpler_system.
Note the traditional time zone was determined by local sun position
and so should be local time without daylight savings time.
"""
function nauticalbells(dt::DateTime)
hr = hour(dt)
mn = minute(dt)
if hr in [00, 12, 4, 8, 16, 20]
return mn == 00 ? "2 2 2 2" : "1"
elseif hr in [1, 5, 9, 13, 17, 21]
return mn == 00 ? "2" : "2 1"
elseif hr in [2, 6, 10, 14, 18, 22]
return mn == 00 ? "2 2" : "2 2 1"
elseif hr in [3, 7, 11, 15, 19, 23]
return mn == 00 ? "2 2 2" : "2 2 2 1"
else
return "Gong pattern error: time $dt, hour $hr, minutes $mn"
end
end
function nauticalbelltask()
untilnextbell = ceil(now(), Dates.Minute(30)) - now()
delay = untilnextbell.value / 1000
println("Nautical bell task starting -- next bell in $delay seconds.")
# The timer wakes its task every half hour. May drift very slightly so restart yearly.
timer = Timer(delay; interval=1800)
while true
wait(timer)
gong = nauticalbells(now())
println("Nautical bell gong strikes ", gong)
end
end
nauticalbelltask()
</syntaxhighlight> {{output}} <pre>
Nautical bell task starting -- next bell in 1201.726 seconds.
Nautical bell gong strikes 2 2 2
Nautical bell gong strikes 2 2 2 1
Nautical bell gong strikes 2 2 2 2
Nautical bell gong strikes 1
Nautical bell gong strikes 2
Nautical bell gong strikes 2 1
Nautical bell gong strikes 2 2
Nautical bell gong strikes 2 2 1
Nautical bell gong strikes 2 2 2
Nautical bell gong strikes 2 2 2 1
Nautical bell gong strikes 2 2 2 2
Nautical bell gong strikes 1
Nautical bell gong strikes 2
Nautical bell gong strikes 2 1
Nautical bell gong strikes 2 2
Nautical bell gong strikes 2 2 1
Nautical bell gong strikes 2 2 2
Nautical bell gong strikes 2 2 2 1
,,,
</pre>
=={{header|Kotlin}}==
{{trans|Java}}
<syntaxhighlight lang="scala">// version 1.1.3
import java.text.DateFormat
import java.text.SimpleDateFormat
import java.util.TimeZone
class NauticalBell: Thread() {
override fun run() {
val sdf = SimpleDateFormat("HH:mm:ss")
sdf.timeZone = TimeZone.getTimeZone("UTC")
var numBells = 0
var time = System.currentTimeMillis()
var next = time - (time % (24 * 60 * 60 * 1000)) // midnight
while (next < time) {
next += 30 * 60 * 1000 // 30 minutes
numBells = 1 + (numBells % 8)
}
while (true) {
var wait = 100L
time = System.currentTimeMillis()
if ((time - next) >= 0) {
val bells = if (numBells == 1) "bell" else "bells"
val timeString = sdf.format(time)
println("%s : %d %s".format(timeString, numBells, bells))
next += 30 * 60 * 1000
wait = next - time
numBells = 1 + (numBells % 8)
}
try {
Thread.sleep(wait)
}
catch (ie: InterruptedException) {
return
}
}
}
}
fun main(args: Array<String>) {
val bells = NauticalBell()
with (bells) {
setDaemon(true)
start()
try {
join()
}
catch (ie: InterruptedException) {
println(ie.message)
}
}
}</syntaxhighlight>
Sample output:
<pre>
....
10:30:00 : 5 bells
11:00:00 : 6 bells
11:30:00 : 7 bells
....
</pre>
=={{header|Mathematica}}/{{header|Wolfram Language}}==
Works on version 11.2 ARM, a bug prevents this from working on version 11.3 Win64.
<syntaxhighlight lang="mathematica">LocalSubmit[ScheduledTask[
EmitSound[Sound[Table[{
SoundNote["C",750/1000,"TubularBells"],SoundNote[None,500/1000,"TubularBells"]
},Mod[Round[Total[DateList[][[{4,5}]]{2,1/30}]],8,1]]]]
,DateObject[{_,_,_,_,_,30|0}]]]</syntaxhighlight>
=={{header|Nim}}==
{{trans|Phix}}
Using UTC time but the program can easily be adapted to use local time (replace <code>getTime().utc()</code> with <code>getTime().local()</code> or <code>now()</code>).
<syntaxhighlight lang="nim">import os, strformat, times
const
Watches = ["First", "Middle", "Morning", "Forenoon", "Afternoon", "First dog", "Last dog", "First"]
WatchEnds = [(0, 0), (4, 0), (8, 0), (12, 0), (16, 0), (18, 0), (20, 0), (23, 59)]
Bells = array[1..8, string](["One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight"])
Ding = "ding!"
proc nb(h, m: Natural) =
var bell = (h * 60 + m) div 30 mod 8
if bell == 0: bell = 8
let hm = (h, m)
var watch = 0
while hm > WatchEnds[watch]: inc watch
let plural = if bell == 1: ' ' else: 's'
var dings = Ding
for i in 2..bell:
if i mod 2 != 0: dings.add ' '
dings.add Ding
echo &"{h:02d}:{m:02d} {Watches[watch]:>9} watch {Bells[bell]:>5} bell{plural} {dings}"
proc simulateOneDay() =
for h in 0..23:
for m in [0, 30]:
nb(h, m)
nb(0, 0)
when isMainModule:
simulateOneDay()
while true:
let d = getTime().utc()
var m = d.second + (d.minute mod 30) * 60
if m == 0:
nb(d.hour, d.minute)
sleep((1800 - m) * 1000) # In milliseconds.</syntaxhighlight>
{{out}}
Same as Phix output.
=={{header|OoRexx}}==
{{trans|REXX}}
<syntaxhighlight lang="oorexx">/*REXX pgm beep's "bells" (using PC speaker) when running (perpetually).*/
Parse Arg msg
If msg='?' Then Do
Say 'Ring a nautical bell'
Exit
End
Signal on Halt /* allow a clean way to stop prog.*/
Do Forever
Parse Value time() With hh ':' mn ':' ss
ct=time('C')
hhmmc=left(right(ct,7,0),5) /* HH:MM (leading zero). */
If msg>'' Then
Say center(arg(1) ct time(),79) /* echo arg1 with time ? */
If ss==00 & ( mn==00 | mn==30 ) Then Do /*It's time to ring bell */
dd=dd(hhmmc) /* compute number of times */
If msg>'' Then
Say center(dd "bells",79) /* echo bells? */
Do k=1 For dd
Call beep 650,500
Call syssleep 1+(k//2==0)
End
Call syssleep 60 /* ensure don't re-peel. */
End
Else
Call syssleep (60-ss)
End
/* test
time:
If arg(1)='C' Then
res='8:30am'
Else
res='08:30:00'
Return res
*/
dd: Parse Arg hhmmc
Parse Var hhmmc hh +2 ':' mm .
h=hh//4
If h=0 Then
If mm=00 Then res=8
Else res=1
Else
res=2*h+(mm=30)
Return res
halt:</syntaxhighlight>
=={{header|Perl}}==
{{trans|Raku}}
<syntaxhighlight lang="perl">use utf8;
binmode STDOUT, ":utf8";
use DateTime;
$| = 1; # to prevent output buffering
my @watch = <Middle Morning Forenoon Afternoon Dog First>;
my @ordinal = <One Two Three Four Five Six Seven Eight>;
my $thishour;
my $thisminute = '';
while () {
my $utc = DateTime
if ($utc
$thishour = $utc
$thisminute = $utc
bell($thishour, $thisminute);
}
printf "%s%02d:%02d:%02d", "\r", $utc
sleep(1);
}
sub bell
my($hour, $minute) = @_;
my $bells = (($hour % 4) * 2 + int $minute/30) || 8;
printf "%s%02d:%02d
chime($bells);
}
sub chime {
my($count) = shift;
for (1..int($count/2)) {
}
if ($count % 2) {
print "\a♪"; sleep 1;
}
print "\n";
}</syntaxhighlight>
{{out}}
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=={{header|Phix}}==
{{trans|Ruby}}
{{trans|AWK}}
Uses GMT, can easily be switched to local time by simply removing DT_GMT, ie invoking <code>date()</code>
instead of <code>date(DT_GMT)</code>.<br>
Uses a full-length sleep of up to 1800 seconds (half an hour), as it should.
<!--<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;">watches</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"First"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Middle"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Morning"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Forenoon"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Afternoon"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"First dog"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Last dog"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"First"</span><span style="color: #0000FF;">},</span>
<span style="color: #000000;">watch_ends</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"00:00"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"04:00"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"08:00"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"12:00"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"16:00"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"18:00"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"20:00"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"23:59"</span><span style="color: #0000FF;">},</span>
<span style="color: #000000;">bells</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"One"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Two"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Three"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Four"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Five"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Six"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Seven"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Eight"</span><span style="color: #0000FF;">},</span>
<span style="color: #000000;">ding</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"ding!"</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">nb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">h</span><span style="color: #0000FF;">,</span><span style="color: #000000;">m</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">bell</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">floor</span><span style="color: #0000FF;">((</span><span style="color: #000000;">h</span><span style="color: #0000FF;">*</span><span style="color: #000000;">60</span><span style="color: #0000FF;">+</span><span style="color: #000000;">m</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">30</span><span style="color: #0000FF;">),</span><span style="color: #000000;">8</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">bell</span><span style="color: #0000FF;">==</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #000000;">bell</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">8</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">hm</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%02d:%02d"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">h</span><span style="color: #0000FF;">,</span><span style="color: #000000;">m</span><span style="color: #0000FF;">})</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">watch</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">hm</span><span style="color: #0000FF;">></span><span style="color: #000000;">watch_ends</span><span style="color: #0000FF;">[</span><span style="color: #000000;">watch</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">do</span> <span style="color: #000000;">watch</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span> <span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">plural</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">bell</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;">"s"</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">dings</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">ding</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">2</span> <span style="color: #008080;">to</span> <span style="color: #000000;">bell</span> <span style="color: #008080;">do</span> <span style="color: #000000;">dings</span> <span style="color: #0000FF;">&=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">2</span><span style="color: #0000FF;">)?</span><span style="color: #008000;">" "</span><span style="color: #0000FF;">:</span><span style="color: #008000;">""</span><span style="color: #0000FF;">)&</span><span style="color: #000000;">ding</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;">"%s %9s watch %5s bell%s %s\n"</span><span style="color: #0000FF;">,</span>
<span style="color: #0000FF;">{</span><span style="color: #000000;">hm</span><span style="color: #0000FF;">,</span><span style="color: #000000;">watches</span><span style="color: #0000FF;">[</span><span style="color: #000000;">watch</span><span style="color: #0000FF;">],</span><span style="color: #000000;">bells</span><span style="color: #0000FF;">[</span><span style="color: #000000;">bell</span><span style="color: #0000FF;">],</span><span style="color: #000000;">plural</span><span style="color: #0000FF;">,</span><span style="color: #000000;">dings</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;">simulate1day</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">h</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">to</span> <span style="color: #000000;">23</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">m</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">to</span> <span style="color: #000000;">30</span> <span style="color: #008080;">by</span> <span style="color: #000000;">30</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">nb</span><span style="color: #0000FF;">(</span><span style="color: #000000;">h</span><span style="color: #0000FF;">,</span><span style="color: #000000;">m</span><span style="color: #0000FF;">)</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: #000000;">nb</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (again)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #000000;">simulate1day</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: #000080;font-style:italic;">-- (no sleep() function)</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">d</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">date</span><span style="color: #0000FF;">(</span><span style="color: #004600;">DT_GMT</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">m</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">d</span><span style="color: #0000FF;">[</span><span style="color: #004600;">DT_SECOND</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">+</span> <span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #000000;">d</span><span style="color: #0000FF;">[</span><span style="color: #004600;">DT_MINUTE</span><span style="color: #0000FF;">],</span><span style="color: #000000;">30</span><span style="color: #0000FF;">)*</span><span style="color: #000000;">60</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">m</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">nb</span><span style="color: #0000FF;">(</span><span style="color: #000000;">d</span><span style="color: #0000FF;">[</span><span style="color: #004600;">DT_HOUR</span><span style="color: #0000FF;">],</span><span style="color: #000000;">d</span><span style="color: #0000FF;">[</span><span style="color: #004600;">DT_MINUTE</span><span style="color: #0000FF;">])</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #7060A8;">sleep</span><span style="color: #0000FF;">(</span><span style="color: #000000;">30</span><span style="color: #0000FF;">*</span><span style="color: #000000;">60</span><span style="color: #0000FF;">-</span><span style="color: #000000;">m</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<!--</syntaxhighlight>-->
{{out}}
<pre>
00:00 First watch Eight bells ding!ding! ding!ding! ding!ding! ding!ding!
00:30 Middle watch One bell ding!
01:00 Middle watch Two bells ding!ding!
01:30 Middle watch Three bells ding!ding! ding!
02:00 Middle watch Four bells ding!ding! ding!ding!
02:30 Middle watch Five bells ding!ding! ding!ding! ding!
03:00 Middle watch Six bells ding!ding! ding!ding! ding!ding!
03:30 Middle watch Seven bells ding!ding! ding!ding! ding!ding! ding!
04:00 Middle watch Eight bells ding!ding! ding!ding! ding!ding! ding!ding!
04:30 Morning watch One bell ding!
05:00 Morning watch Two bells ding!ding!
05:30 Morning watch Three bells ding!ding! ding!
06:00 Morning watch Four bells ding!ding! ding!ding!
06:30 Morning watch Five bells ding!ding! ding!ding! ding!
07:00 Morning watch Six bells ding!ding! ding!ding! ding!ding!
07:30 Morning watch Seven bells ding!ding! ding!ding! ding!ding! ding!
08:00 Morning watch Eight bells ding!ding! ding!ding! ding!ding! ding!ding!
08:30 Forenoon watch One bell ding!
09:00 Forenoon watch Two bells ding!ding!
09:30 Forenoon watch Three bells ding!ding! ding!
10:00 Forenoon watch Four bells ding!ding! ding!ding!
10:30 Forenoon watch Five bells ding!ding! ding!ding! ding!
11:00 Forenoon watch Six bells ding!ding! ding!ding! ding!ding!
11:30 Forenoon watch Seven bells ding!ding! ding!ding! ding!ding! ding!
12:00 Forenoon watch Eight bells ding!ding! ding!ding! ding!ding! ding!ding!
12:30 Afternoon watch One bell ding!
13:00 Afternoon watch Two bells ding!ding!
13:30 Afternoon watch Three bells ding!ding! ding!
14:00 Afternoon watch Four bells ding!ding! ding!ding!
14:30 Afternoon watch Five bells ding!ding! ding!ding! ding!
15:00 Afternoon watch Six bells ding!ding! ding!ding! ding!ding!
15:30 Afternoon watch Seven bells ding!ding! ding!ding! ding!ding! ding!
16:00 Afternoon watch Eight bells ding!ding! ding!ding! ding!ding! ding!ding!
16:30 First dog watch One bell ding!
17:00 First dog watch Two bells ding!ding!
17:30 First dog watch Three bells ding!ding! ding!
18:00 First dog watch Four bells ding!ding! ding!ding!
18:30 Last dog watch Five bells ding!ding! ding!ding! ding!
19:00 Last dog watch Six bells ding!ding! ding!ding! ding!ding!
19:30 Last dog watch Seven bells ding!ding! ding!ding! ding!ding! ding!
20:00 Last dog watch Eight bells ding!ding! ding!ding! ding!ding! ding!ding!
20:30 First watch One bell ding!
21:00 First watch Two bells ding!ding!
21:30 First watch Three bells ding!ding! ding!
22:00 First watch Four bells ding!ding! ding!ding!
22:30 First watch Five bells ding!ding! ding!ding! ding!
23:00 First watch Six bells ding!ding! ding!ding! ding!ding!
23:30 First watch Seven bells ding!ding! ding!ding! ding!ding! ding!
00:00 First watch Eight bells ding!ding! ding!ding! ding!ding! ding!ding!
13:00 Afternoon watch Two bells ding!ding!
13:30 Afternoon watch Three bells ding!ding! ding!
</pre>
=={{header|PL/I}}==
This program sounds the bell as well as displaying "gong" an appropriate number of times. It operates on local time.
<syntaxhighlight lang="pl/i">
nautical: procedure options (main); /* 29 October 2013 */
declare (hour, t, i) fixed binary;
do until (substr(time(), 3, 4) = '0000'); delay (1000); end;
hour = substr(time(), 1, 2);
do while ('1'b);
do i = 1 to hour;
put edit ('07'X) (a); put skip edit ('gong ') (a); delay (500);
end;
t = substr(time(), 5);
delay (60*60*1000 - t);
end;
end nautical;
</syntaxhighlight>
=={{header|PowerShell}}==
<syntaxhighlight lang="powershell">
function Get-Bell
{
[CmdletBinding()]
Param
(
[Parameter(Mandatory=$true,
Position=0)]
[ValidateRange(1,12)]
[int]
$Hour,
[Parameter(Mandatory=$true,
Position=1)]
[ValidateSet(0,30)]
[int]
$Minute
)
$bells = @{
OneBell = 1
TwoBells = 2
ThreeBells = 2, 1
FourBells = 2, 2
FiveBells = 2, 2, 1
SixBells = 2, 2, 2
SevenBells = 2, 2, 2, 1
EightBells = 2, 2, 2, 2
}
filter Invoke-Bell
{
if ($_ -eq 1)
{
[System.Media.SystemSounds]::Asterisk.Play()
Write-Host -NoNewline "♪"
}
else
{
[System.Media.SystemSounds]::Exclamation.Play()
Write-Host -NoNewline "♪♪ "
}
Start-Sleep -Milliseconds 500
}
$time = New-TimeSpan -Hours $Hour -Minutes $Minute
switch ($time.Hours)
{
1 {if ($time.Minutes -eq 0) {$bells.TwoBells | Invoke-Bell} else {$bells.ThreeBells | Invoke-Bell}; break}
2 {if ($time.Minutes -eq 0) {$bells.FourBells | Invoke-Bell} else {$bells.FiveBells | Invoke-Bell}; break}
3 {if ($time.Minutes -eq 0) {$bells.SixBells | Invoke-Bell} else {$bells.SevenBells | Invoke-Bell}; break}
4 {if ($time.Minutes -eq 0) {$bells.EightBells | Invoke-Bell} else {$bells.OneBell | Invoke-Bell}; break}
5 {if ($time.Minutes -eq 0) {$bells.TwoBells | Invoke-Bell} else {$bells.ThreeBells | Invoke-Bell}; break}
6 {if ($time.Minutes -eq 0) {$bells.FourBells | Invoke-Bell} else {$bells.FiveBells | Invoke-Bell}; break}
7 {if ($time.Minutes -eq 0) {$bells.SixBells | Invoke-Bell} else {$bells.SevenBells | Invoke-Bell}; break}
8 {if ($time.Minutes -eq 0) {$bells.EightBells | Invoke-Bell} else {$bells.OneBell | Invoke-Bell}; break}
9 {if ($time.Minutes -eq 0) {$bells.TwoBells | Invoke-Bell} else {$bells.ThreeBells | Invoke-Bell}; break}
10 {if ($time.Minutes -eq 0) {$bells.FourBells | Invoke-Bell} else {$bells.FiveBells | Invoke-Bell}; break}
11 {if ($time.Minutes -eq 0) {$bells.SixBells | Invoke-Bell} else {$bells.SevenBells | Invoke-Bell}; break}
12 {if ($time.Minutes -eq 0) {$bells.EightBells | Invoke-Bell} else {$bells.OneBell | Invoke-Bell}}
}
Write-Host
}
Write-Host "Time Bells`n---- -----`n"
1..12 | ForEach-Object {
$date = Get-Date -Hour $_ -Minute 0
Write-Host -NoNewline "$($date.ToString("hh:mm")) "
Get-Bell -Hour $_ -Minute 0
$date = $date.AddMinutes(30)
Write-Host -NoNewline "$($date.ToString("hh:mm")) "
Get-Bell -Hour $_ -Minute 30
}
</syntaxhighlight>
{{Out}}
<pre>
Time Bells
---- -----
01:00 ♪♪
01:30 ♪♪ ♪
02:00 ♪♪ ♪♪
02:30 ♪♪ ♪♪ ♪
03:00 ♪♪ ♪♪ ♪♪
03:30 ♪♪ ♪♪ ♪♪ ♪
04:00 ♪♪ ♪♪ ♪♪ ♪♪
04:30 ♪
05:00 ♪♪
05:30 ♪♪ ♪
06:00 ♪♪ ♪♪
06:30 ♪♪ ♪♪ ♪
07:00 ♪♪ ♪♪ ♪♪
07:30 ♪♪ ♪♪ ♪♪ ♪
08:00 ♪♪ ♪♪ ♪♪ ♪♪
08:30 ♪
09:00 ♪♪
09:30 ♪♪ ♪
10:00 ♪♪ ♪♪
10:30 ♪♪ ♪♪ ♪
11:00 ♪♪ ♪♪ ♪♪
11:30 ♪♪ ♪♪ ♪♪ ♪
12:00 ♪♪ ♪♪ ♪♪ ♪♪
12:30 ♪
</pre>
=={{header|Python}}==
As well as typing output to stdout, this program plays a sound for each bell as the ␇ characters are printed (The spaces between the ␇ characters are mirrored as varying delays between each ring).
<
duration = 750 # Bell duration in ms
Line 268 ⟶ 1,521:
if __name__ == '__main__':
ships_bell()</
{{out}}
<pre>00:00, First watch 8 bells ␇ ␇ ␇ ␇ ␇ ␇ ␇ ␇
Line 318 ⟶ 1,571:
23:00, First watch 6 bells ␇ ␇ ␇ ␇ ␇ ␇
23:30, First watch 7 bells ␇ ␇ ␇ ␇ ␇ ␇ ␇ </pre>
=={{header|Racket}}==
This solution uses local time. It also doesn't poll. If it's printing to a terminal
that displays \a by playing the system bell, it will play the system bell.
<syntaxhighlight lang="racket">#lang racket
(require racket/date)
(define HALF-HOUR-SECS (* 60 30))
;; given a date, return the seconds corresponding to the beginning
;; of that day (in local time)
(define (beginning-of-date d)
(find-seconds 0 0 0 (date-day d) (date-month d) (date-year d)))
;; the seconds at the beginning of today:
(define today-secs
(beginning-of-date
(seconds->date (current-seconds))))
;; hours -> watch : given an hour, return the watch name
(define (hours->watch hours)
(cond [(= 0 hours) "first"]
[(< 0 hours 4.5) "middle"]
[(< 4 hours 8.5) "morning"]
[(< 8 hours 12.5) "forenoon"]
[(< 12 hours 16.5) "afternoon"]
[(< 16 hours 20.5) "dog"]
[(< 20 hours 24.5) "first"]))
;; wait until current-seconds is the given number
(define (wait-til secs)
(sleep (- secs (current-seconds))))
;; display the appropriate message
(define (format-and-print hours bells)
(define int-hours (floor hours))
(define minutes (cond [(integer? hours) "00"]
[else "30"]))
(display
(~a
(~a (floor hours) #:min-width 2 #:pad-string "0"
#:align 'right)
":" minutes ", " bells " bell(s) of the "
(hours->watch hours) " watch "))
;; play the bells, if possible:
(for ([i bells])
(display "\a♪")
(flush-output)
(cond [(even? i) (sleep 0.5)]
[(odd? i) (display " ") (sleep 1)]))
(display "\n"))
;; start the loop:
(for ([s (in-range today-secs +inf.0 HALF-HOUR-SECS)]
[bells (sequence-tail (in-cycle (in-range 8)) 7)]
[hours (in-cycle (in-range 0 24 1/2))])
;; ignore the ones that have already happened:
(when (< (current-seconds) s)
(wait-til s)
(format-and-print hours (add1 bells))))
</syntaxhighlight>
This might produce the following output:
<pre>
21:00, 2 bell(s) of the first watch �♪�♪
21:30, 3 bell(s) of the first watch �♪�♪ �♪
22:00, 4 bell(s) of the first watch �♪�♪ �♪�♪
22:30, 5 bell(s) of the first watch �♪�♪ �♪�♪ �♪
23:00, 6 bell(s) of the first watch �♪�♪ �♪�♪ �♪�♪
23:30, 7 bell(s) of the first watch �♪�♪ �♪�♪ �♪�♪ �♪
00:00, 8 bell(s) of the first watch �♪�♪ �♪�♪ �♪�♪ �♪�♪
00:30, 1 bell(s) of the middle watch �♪
01:00, 2 bell(s) of the middle watch �♪�♪
</pre>
=={{header|Raku}}==
(formerly Perl 6)
Raku uses [[wp:Coordinated_Universal_Time|UTC]] (GMT) time internally and by default. This will display the current UTC time and on the half hour, display a graphical representation of the bell. If run in a terminal with the system bell enabled, will also chime the system alarm bell.
<syntaxhighlight lang="raku" line>my @watch = <Middle Morning Forenoon Afternoon Dog First>;
my @ordinal = <One Two Three Four Five Six Seven Eight>;
my $thishour;
my $thisminute = '';
loop {
my $utc = DateTime.new(time);
if $utc.minute ~~ any(0,30) and $utc.minute != $thisminute {
$thishour = $utc.hour;
$thisminute = $utc.minute;
bell($thishour, $thisminute);
}
printf "%s%02d:%02d:%02d", "\r", $utc.hour, $utc.minute, $utc.second;
sleep(1);
}
sub bell ($hour, $minute) {
my $bells = (($hour % 4) * 2 + $minute div 30) || 8;
printf "%s%02d:%02d %9s watch, %6s Bell%s Gone: \t", "\b" x 9, $hour, $minute,
@watch[($hour div 4 - !?($minute + $hour % 4) + 6) % 6],
@ordinal[$bells - 1], $bells == 1 ?? '' !! 's';
chime($bells);
sub chime ($count) {
for 1..$count div 2 {
print "\a♫ ";
sleep .25;
print "\a";
sleep .75;
}
if $count % 2 {
print "\a♪";
sleep 1;
}
print "\n";
}
}</syntaxhighlight>
{{out}}
<pre>00:00 First watch, Eight Bells Gone: ♫ ♫ ♫ ♫
00:30 Middle watch, One Bell Gone: ♪
01:00 Middle watch, Two Bells Gone: ♫
01:30 Middle watch, Three Bells Gone: ♫ ♪
02:00 Middle watch, Four Bells Gone: ♫ ♫
02:30 Middle watch, Five Bells Gone: ♫ ♫ ♪
03:00 Middle watch, Six Bells Gone: ♫ ♫ ♫
03:30 Middle watch, Seven Bells Gone: ♫ ♫ ♫ ♪
04:00 Middle watch, Eight Bells Gone: ♫ ♫ ♫ ♫
04:30 Morning watch, One Bell Gone: ♪
05:00 Morning watch, Two Bells Gone: ♫
05:30 Morning watch, Three Bells Gone: ♫ ♪
06:00 Morning watch, Four Bells Gone: ♫ ♫
06:30 Morning watch, Five Bells Gone: ♫ ♫ ♪
07:00 Morning watch, Six Bells Gone: ♫ ♫ ♫
07:30 Morning watch, Seven Bells Gone: ♫ ♫ ♫ ♪
08:00 Morning watch, Eight Bells Gone: ♫ ♫ ♫ ♫
08:30 Forenoon watch, One Bell Gone: ♪
09:00 Forenoon watch, Two Bells Gone: ♫
09:30 Forenoon watch, Three Bells Gone: ♫ ♪
10:00 Forenoon watch, Four Bells Gone: ♫ ♫
10:30 Forenoon watch, Five Bells Gone: ♫ ♫ ♪
11:00 Forenoon watch, Six Bells Gone: ♫ ♫ ♫
11:30 Forenoon watch, Seven Bells Gone: ♫ ♫ ♫ ♪
12:00 Forenoon watch, Eight Bells Gone: ♫ ♫ ♫ ♫
12:30 Afternoon watch, One Bell Gone: ♪
13:00 Afternoon watch, Two Bells Gone: ♫
13:30 Afternoon watch, Three Bells Gone: ♫ ♪
14:00 Afternoon watch, Four Bells Gone: ♫ ♫
14:30 Afternoon watch, Five Bells Gone: ♫ ♫ ♪
15:00 Afternoon watch, Six Bells Gone: ♫ ♫ ♫
15:30 Afternoon watch, Seven Bells Gone: ♫ ♫ ♫ ♪
16:00 Afternoon watch, Eight Bells Gone: ♫ ♫ ♫ ♫
16:30 Dog watch, One Bell Gone: ♪
17:00 Dog watch, Two Bells Gone: ♫
17:30 Dog watch, Three Bells Gone: ♫ ♪
18:00 Dog watch, Four Bells Gone: ♫ ♫
18:30 Dog watch, Five Bells Gone: ♫ ♫ ♪
19:00 Dog watch, Six Bells Gone: ♫ ♫ ♫
19:30 Dog watch, Seven Bells Gone: ♫ ♫ ♫ ♪
20:00 Dog watch, Eight Bells Gone: ♫ ♫ ♫ ♫
20:30 First watch, One Bell Gone: ♪
21:00 First watch, Two Bells Gone: ♫
21:30 First watch, Three Bells Gone: ♫ ♪
22:00 First watch, Four Bells Gone: ♫ ♫
22:30 First watch, Five Bells Gone: ♫ ♫ ♪
23:00 First watch, Six Bells Gone: ♫ ♫ ♫
23:30 First watch, Seven Bells Gone: ♫ ♫ ♫ ♪</pre>
=={{header|REXX}}==
Line 323 ⟶ 1,750:
If any arguments are specified, that text is used as a prefix to the times shown (once a minute).
<br>Also, the number of bells sounded are shown (if any arguments are specified).
<br>If no arguments are specified, no times are shown.
In all cases, the PC speaker is used to sound the bells (albeit a poorly sounded bell).
This REXX program makes use of
Some REXXes don't have a '''delay''' BIF, so one is included <big> [[DELAY.REX|here]]. </big>
Also, some REXXes don't have a '''sound''' BIF, which produces sounds via the PC speaker,
so one is included <big> [[SOUND.REX|here]]. </big>
<syntaxhighlight lang="rexx">/*REXX program sounds "ship's bells" (using PC speaker) when executing (perpetually).*/
echo= ( arg()\==0 ) /*echo time and bells if any arguments.*/
signal on halt /*allow a clean way to stop the program*/
t.1= '00:30 01:00 01:30 02:00 02:30 03:00 03:30 04:00'
t.2= '04:30 05:00 05:30 06:00 06:30 07:00 07:30 08:00'
t.3= '08:30 09:00 09:30 10:00 10:30 11:00 11:30 12:00'
do
ct=time('C') /*[↓] maybe add leading zero to time. */
hhmmc=left( right( ct, 7, 0), 5) /*HH:MM (maybe with a leading zero). */
if echo then say center(arg(1) ct, 79) /*echo the 1st argument with the time? */
if ss\==00 & mn\==00 & mn\==30 then do; call delay 60-ss; iterate
end /* [↑] delay for fraction of a minute.*/
/* [↓] the number of bells to peel {$}*/
do j=1 for 3 until $\==0; $=wordpos(hhmmc, t.j)
end /*j*/
if $\==0 & echo then say center($ "bells", 79) /*echo the number of bells? */
end /*k*/ /*[↑] peel, and then pause for effect.*/
end /*forever*/
halt: /*stick a fork in it, we're all done. */</syntaxhighlight>
{{out|output|text= when using the input of: <big> <tt> the time is: </tt> </big>}}
<pre>
the time is: 1:48pm
Line 373 ⟶ 1,806:
∙
∙
</pre>
=={{header|Ring}}==
<syntaxhighlight lang="ring">
# Project : Nautical bell
m = 0
for n = 0 to 23
if n = 23
see "23" + ":30" + " = " + "7 bells" + nl
else
m = m + 1
see "" + n%23 + ":30" + " = " + m + " bells" + nl
ok
if n = 23
see "00" + ":00" + " = " + "8 bells" + nl
else
m = m + 1
see "" + (n%23+1) + ":00" + " = " + m + " bells" + nl
if m = 8
m = 0
ok
ok
next
</syntaxhighlight>
Output:
<pre>
0:30 = 1 bells
1:00 = 2 bells
1:30 = 3 bells
2:00 = 4 bells
2:30 = 5 bells
3:00 = 6 bells
3:30 = 7 bells
4:00 = 8 bells
4:30 = 1 bells
5:00 = 2 bells
5:30 = 3 bells
6:00 = 4 bells
6:30 = 5 bells
7:00 = 6 bells
7:30 = 7 bells
8:00 = 8 bells
8:30 = 1 bells
9:00 = 2 bells
9:30 = 3 bells
10:00 = 4 bells
10:30 = 5 bells
11:00 = 6 bells
11:30 = 7 bells
12:00 = 8 bells
12:30 = 1 bells
13:00 = 2 bells
13:30 = 3 bells
14:00 = 4 bells
14:30 = 5 bells
15:00 = 6 bells
15:30 = 7 bells
16:00 = 8 bells
16:30 = 1 bells
17:00 = 2 bells
17:30 = 3 bells
18:00 = 4 bells
18:30 = 5 bells
19:00 = 6 bells
19:30 = 7 bells
20:00 = 8 bells
20:30 = 1 bells
21:00 = 2 bells
21:30 = 3 bells
22:00 = 4 bells
22:30 = 5 bells
23:00 = 6 bells
23:30 = 7 bells
00:00 = 8 bells
</pre>
=={{header|Ruby}}==
<syntaxhighlight lang="ruby">watches = [ "First", "Middle", "Morning", "Forenoon", "Afternoon", "First dog", "Last dog", "First" ]
watch_ends = [ "00:00", "04:00", "08:00", "12:00", "16:00", "18:00", "20:00", "23:59" ]
words = ["One","Two","Three","Four","Five","Six","Seven","Eight"]
sound = "ding!"
loop do
time = Time.now
if time.sec == 0 and time.min % 30 == 0
num = (time.hour * 60 + time.min) / 30 % 8
num = 8 if num == 0
hr_min = time.strftime "%H:%M"
idx = watch_ends.find_index {|t| hr_min <= t}
text = "%s - %s watch, %s bell%s gone" % [
hr_min,
watches[idx],
words[num-1],
num==1 ? "" : "s"
]
bells = (sound * num).gsub(sound + sound) {|dd| dd + ' '}
puts "%-45s %s" % [text, bells]
end
sleep 1
end</syntaxhighlight>
{{out|Sample output}}
<pre style="height:64ex;overflow:scroll">
00:00 - First watch, Eight bells gone ding!ding! ding!ding! ding!ding! ding!ding!
00:30 - Middle watch, One bell gone ding!
01:00 - Middle watch, Two bells gone ding!ding!
01:30 - Middle watch, Three bells gone ding!ding! ding!
02:00 - Middle watch, Four bells gone ding!ding! ding!ding!
02:30 - Middle watch, Five bells gone ding!ding! ding!ding! ding!
03:00 - Middle watch, Six bells gone ding!ding! ding!ding! ding!ding!
03:30 - Middle watch, Seven bells gone ding!ding! ding!ding! ding!ding! ding!
04:00 - Middle watch, Eight bells gone ding!ding! ding!ding! ding!ding! ding!ding!
04:30 - Morning watch, One bell gone ding!
05:00 - Morning watch, Two bells gone ding!ding!
05:30 - Morning watch, Three bells gone ding!ding! ding!
06:00 - Morning watch, Four bells gone ding!ding! ding!ding!
06:30 - Morning watch, Five bells gone ding!ding! ding!ding! ding!
07:00 - Morning watch, Six bells gone ding!ding! ding!ding! ding!ding!
07:30 - Morning watch, Seven bells gone ding!ding! ding!ding! ding!ding! ding!
08:00 - Morning watch, Eight bells gone ding!ding! ding!ding! ding!ding! ding!ding!
08:30 - Forenoon watch, One bell gone ding!
09:00 - Forenoon watch, Two bells gone ding!ding!
09:30 - Forenoon watch, Three bells gone ding!ding! ding!
10:00 - Forenoon watch, Four bells gone ding!ding! ding!ding!
10:30 - Forenoon watch, Five bells gone ding!ding! ding!ding! ding!
11:00 - Forenoon watch, Six bells gone ding!ding! ding!ding! ding!ding!
11:30 - Forenoon watch, Seven bells gone ding!ding! ding!ding! ding!ding! ding!
12:00 - Forenoon watch, Eight bells gone ding!ding! ding!ding! ding!ding! ding!ding!
12:30 - Afternoon watch, One bell gone ding!
13:00 - Afternoon watch, Two bells gone ding!ding!
13:30 - Afternoon watch, Three bells gone ding!ding! ding!
14:00 - Afternoon watch, Four bells gone ding!ding! ding!ding!
14:30 - Afternoon watch, Five bells gone ding!ding! ding!ding! ding!
15:00 - Afternoon watch, Six bells gone ding!ding! ding!ding! ding!ding!
15:30 - Afternoon watch, Seven bells gone ding!ding! ding!ding! ding!ding! ding!
16:00 - Afternoon watch, Eight bells gone ding!ding! ding!ding! ding!ding! ding!ding!
16:30 - First dog watch, One bell gone ding!
17:00 - First dog watch, Two bells gone ding!ding!
17:30 - First dog watch, Three bells gone ding!ding! ding!
18:00 - First dog watch, Four bells gone ding!ding! ding!ding!
18:30 - Last dog watch, Five bells gone ding!ding! ding!ding! ding!
19:00 - Last dog watch, Six bells gone ding!ding! ding!ding! ding!ding!
19:30 - Last dog watch, Seven bells gone ding!ding! ding!ding! ding!ding! ding!
20:00 - Last dog watch, Eight bells gone ding!ding! ding!ding! ding!ding! ding!ding!
20:30 - First watch, One bell gone ding!
21:00 - First watch, Two bells gone ding!ding!
21:30 - First watch, Three bells gone ding!ding! ding!
22:00 - First watch, Four bells gone ding!ding! ding!ding!
22:30 - First watch, Five bells gone ding!ding! ding!ding! ding!
23:00 - First watch, Six bells gone ding!ding! ding!ding! ding!ding!
23:30 - First watch, Seven bells gone ding!ding! ding!ding! ding!ding! ding!
00:00 - First watch, Eight bells gone ding!ding! ding!ding! ding!ding! ding!ding!
</pre>
=={{header|Seed7}}==
<syntaxhighlight lang="seed7">$ include "seed7_05.s7i";
include "time.s7i";
include "duration.s7i";
include "keybd.s7i";
const array string: watch is [] ("Middle", "Morning", "Forenoon", "Afternoon", "Dog", "First");
const array string: bells is [] ("One Bell", "Two Bells", "Three Bells", "Four Bells", "Five Bells", "Six Bells", "Seven Bells", "Eight Bells");
const func time: truncToHalfHour (in time: aTime) is func
result
var time: truncatedTime is time.value;
begin
truncatedTime := aTime;
truncatedTime.minute := aTime.minute div 30 * 30;
truncatedTime.second := 0;
truncatedTime.micro_second := 0;
end func;
const proc: main is func
local
var time: nextTime is time.value;
var time: midnight is time.value;
var integer: minutes is 0;
begin
writeln;
nextTime := truncToHalfHour(time(NOW));
midnight := truncToDay(nextTime);
while TRUE do
nextTime +:= 30 . MINUTES;
await(nextTime);
minutes := toMinutes(nextTime - midnight);
writeln(str_hh_mm(nextTime, ":") <& " - " <&
watch[succ((minutes - 30) mdiv 240 mod 6)] <& " watch - " <&
bells[succ((minutes - 30) mdiv 30 mod 8)] <& " Gone.");
flush(OUT);
end while;
end func;</syntaxhighlight>
{{out}}
<pre>
00:00 - First watch - Eight Bells Gone.
00:30 - Middle watch - One Bell Gone.
01:00 - Middle watch - Two Bells Gone.
01:30 - Middle watch - Three Bells Gone.
02:00 - Middle watch - Four Bells Gone.
02:30 - Middle watch - Five Bells Gone.
03:00 - Middle watch - Six Bells Gone.
03:30 - Middle watch - Seven Bells Gone.
04:00 - Middle watch - Eight Bells Gone.
04:30 - Morning watch - One Bell Gone.
05:00 - Morning watch - Two Bells Gone.
05:30 - Morning watch - Three Bells Gone.
06:00 - Morning watch - Four Bells Gone.
06:30 - Morning watch - Five Bells Gone.
07:00 - Morning watch - Six Bells Gone.
07:30 - Morning watch - Seven Bells Gone.
08:00 - Morning watch - Eight Bells Gone.
08:30 - Forenoon watch - One Bell Gone.
09:00 - Forenoon watch - Two Bells Gone.
09:30 - Forenoon watch - Three Bells Gone.
10:00 - Forenoon watch - Four Bells Gone.
10:30 - Forenoon watch - Five Bells Gone.
11:00 - Forenoon watch - Six Bells Gone.
11:30 - Forenoon watch - Seven Bells Gone.
12:00 - Forenoon watch - Eight Bells Gone.
12:30 - Afternoon watch - One Bell Gone.
13:00 - Afternoon watch - Two Bells Gone.
13:30 - Afternoon watch - Three Bells Gone.
14:00 - Afternoon watch - Four Bells Gone.
14:30 - Afternoon watch - Five Bells Gone.
15:00 - Afternoon watch - Six Bells Gone.
15:30 - Afternoon watch - Seven Bells Gone.
16:00 - Afternoon watch - Eight Bells Gone.
16:30 - Dog watch - One Bell Gone.
17:00 - Dog watch - Two Bells Gone.
17:30 - Dog watch - Three Bells Gone.
18:00 - Dog watch - Four Bells Gone.
18:30 - Dog watch - Five Bells Gone.
19:00 - Dog watch - Six Bells Gone.
19:30 - Dog watch - Seven Bells Gone.
20:00 - Dog watch - Eight Bells Gone.
20:30 - First watch - One Bell Gone.
21:00 - First watch - Two Bells Gone.
21:30 - First watch - Three Bells Gone.
22:00 - First watch - Four Bells Gone.
22:30 - First watch - Five Bells Gone.
23:00 - First watch - Six Bells Gone.
23:30 - First watch - Seven Bells Gone.
</pre>
=={{header|Tcl}}==
This code was originally based on the [[#
<
# using the Snack library.
proc ringTheBell {} {
Line 451 ⟶ 2,128:
fconfigure stdout -buffering none
every 1000 nauticalBell
vwait forever; # Only needed if not running an event loop otherwise</
{{out|Sample output}}
<pre>
Line 460 ⟶ 2,137:
18:30 Last dog watch, Five Bells Gone: ♫ ♫ ♪
⋮
</pre>
=={{header|Wren}}==
{{trans|Go}}
{{libheader|Wren-date}}
{{libheader|Wren-fmt}}
As Wren-cli currently has no way of telling what the local time is, we ask the user to input this when executing the script.
On my system (Ubuntu 20.04), the bell only rings once no matter how many \a's are concatenated togther, though it may be different on other systems.
<syntaxhighlight lang="wren">import "os" for Process
import "timer" for Timer
import "./date" for Date
import "./fmt" for Fmt
var watches = ["First", "Middle", "Morning", "Forenoon", "Afternoon", "Dog", "First"]
var args = Process.arguments
if (args.count == 0) {
System.print("Please enter current time in the format (24 hour clock): hh:mm:ss.")
return
}
var now = Date.parse(args[0], Date.isoTime)
while (true) {
var h = now.hour
var m = now.minute
var s = now.second
if ((m == 0 || m == 30) && s == 0) {
var bell = (m == 30) ? 1 : 0
var bells = (h*2 + bell) % 8
var watch = (h/4).floor + 1
if (bells == 0) {
bells = 8
watch = watch - 1
}
var sound = "\a" * bells
var pl = (bells != 1) ? "s" : ""
var w = watches[watch] + " watch"
if (watch == 5) {
if (bells < 5) {
w = "First " + w
} else {
w = "Last " + w
}
}
Fmt.lprint("$s$02d:$02d = $d bell$s : $s", [sound, h, m, bells, pl, w])
}
Timer.sleep(1000)
now = now.addSeconds(1)
}</syntaxhighlight>
{{out}}
<pre>
Similar to Go example.
</pre>
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