Colour bars/Display: Difference between revisions
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The task is to display a series of vertical color bars across the width of the display. The color bars should either use the system palette, or the sequence of colors: Black, Red, Green, Blue, Magenta, Cyan, Yellow, White. |
The task is to display a series of vertical color bars across the width of the display. The color bars should either use the system palette, or the sequence of colors: Black, Red, Green, Blue, Magenta, Cyan, Yellow, White. |
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=={{header|PicoLisp}}== |
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{{trans|UNIX Shell}} |
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<lang PicoLisp>(call 'clear) |
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(let Width (in '(tput cols) (read)) |
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(do (in '(tput lines) (read)) |
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(for B (range 0 7) |
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(call 'tput 'setab B) |
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(space (/ Width 8)) ) |
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(prinl) ) ) |
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(call 'tput 'sgr0) # reset</lang> |
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=={{header|Tcl}}== |
=={{header|Tcl}}== |
Revision as of 18:16, 31 May 2011
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to display a series of vertical color bars across the width of the display. The color bars should either use the system palette, or the sequence of colors: Black, Red, Green, Blue, Magenta, Cyan, Yellow, White.
PicoLisp
<lang PicoLisp>(call 'clear)
(let Width (in '(tput cols) (read))
(do (in '(tput lines) (read)) (for B (range 0 7) (call 'tput 'setab B) (space (/ Width 8)) ) (prinl) ) )
(call 'tput 'sgr0) # reset</lang>
Tcl
<lang tcl>package require Tcl 8.5 package require Tk 8.5
wm attributes . -fullscreen 1 pack [canvas .c] -fill both -expand 1 set colors {black red green blue magenta cyan yellow white}
for {set x 0} {$x < [winfo screenwidth c]} {incr x 8} {
.c create rectangle $x 0 [expr {$x+7}] [winfo screenheight c] \ -fill [lindex $colors 0] -outline {} set colors [list {*}[lrange $colors 1 end] [lindex $colors 0]]
}</lang>
UNIX Shell
<lang sh>#!/bin/sh clear WIDTH=`tput cols` HEIGHT=`tput lines` NUMBARS=8 BARWIDTH=`expr $WIDTH / $NUMBARS`
l="1" # Set the line counter to 1 while [ "$l" -lt $HEIGHT ]; do
b="0" # Bar counter while [ "$b" -lt $NUMBARS ]; do tput setab $b s="0" while [ "$s" -lt $BARWIDTH ]; do echo -n " " s=`expr $s + 1` done b=`expr $b + 1` done echo # newline l=`expr $l + 1`
done
tput sgr0 # reset</lang>
ZX Spectrum Basic
<lang basic>10 REM The ZX Spectrum display is 32 columns wide, so we have 8 columns of 4 spaces 20 FOR r=0 TO 20: REM There are 21 rows 30 FOR c=0 TO 7: REM We use the native colour sequence here 40 PAPER c: REM set the background colour for the spaces to be printed 50 PRINT " ";: REM four spaces, the semicolon prevents newline 60 NEXT c 70 REM at this point the cursor has wrapped, so we don't need a newline 80 NEXT r</lang>