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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Detect-division-by-zero/REXX/detect-division-by-zero.rexx Normal file
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/*REXX program demonstrates detection and handling division by zero. */
signal on syntax /*handle all REXX syntax errors. */
x = sourceline() /*being cute, x=is the size of this pgm*/
y = x - x /*setting to zero the obtuse way. */
z = x / y /*this'll trigger it, furrrr shurrre. */
exit /*We're kaput. Ja vohl ! */
/*──────────────────────────────────────────────────────────────────────────────────────*/
err: if rc==42 then do; say /*first, check for a specific error. */
say center(' ***error*** ', 79, "═")
say 'Division by zero detected at line ' @ ,
" and the REXX statement is:"
say sourceLine(@)
say
exit 42
end
say
say center(' error! ', 79, "*")
do #=1 for arg(); say; say arg(#); say
end /*#*/
exit 13
/*──────────────────────────────────────────────────────────────────────────────────────*/
syntax: @=sigl; call err 'REXX program' condition("C") 'error', condition('D'), ,
'REXX source statement (line' sigl"):", sourceLine(sigl)