Anonymous user
Detect division by zero: Difference between revisions
→{{header|Smalltalk}}
(Updated to take in account the difference between errors and defects.) |
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Line 2,027:
=={{header|Smalltalk}}==
{{works with|Smalltalk/X}}
<lang smalltalk>|didDivideByZero a b|
didDivideByZero := false.
a := 10.
b := 0.
[
a/b
] on: ZeroDivide do:[:ex |
'you tried to divide %P by zero\n' printf:{ex suspendedContext receiver}.
didDivideByZero := true.
].
didDivideByZero ifTrue:[
Transcript show:'bad bad bad, but I already told you in the handler'.
].</lang>
Alternative version, which gets any block as argument, evaluates it and returns true, if ZeroDivide happened (works in all Smalltalks):
{{works with|Squeak}}
{{works with|Smalltalk/X}}
<lang smalltalk>
[:aBlock |
[aBlock value. false] on: ZeroDivide do: [true].▼
aBlock value.
false
].
"Testing"
of course, as ZeroDivide inherits from Error, you could also write <land smalltalk>[...] on:
=={{header|SNOBOL4}}==
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