Re: Debug basic calculator syntax

The comparison operator is not '=' but 'eq' if you want to compare strings. If you change them, the program works.

Update: If you would have activated "warnings" Perl would have told you 'Found = in conditional, should be == at line 19.' which is helpful but misleading as you really should use 'eq' for string comparison.

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law

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Re^2: Debug basic calculator syntax by thor (Priest) on Jun 23, 2005 at 21:19 UTC
Ah...but the second run after changing '=' to '==' will give this error: '`Argument "foo" isn't numeric in numeric eq (==) at line <script name> <line number>`'. It's the old theory of debugging; fix exactly one error at a time, because each error that you fix could be either creating or masking other errors. thor `Feel the white light, the light within Be your own disciple, fan the sparks of will For all of us waiting, your kingdom will come`	[reply]
Re^3: Debug basic calculator syntax by CountZero (Bishop) on Jun 23, 2005 at 21:23 UTC
Well observed! That's why I said the warning message was helpful but misleading. CountZero "If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law	[reply]