Re: the variable is lost

in reply to the variable is lost

So what output did you get?

It might help to verify the return value of open, as in, "open $fh, '<', $_ or die $!;" so you'll know if the open is failing.

Dave

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Re^2: the variable is lost by cruise (Acolyte) on Mar 09, 2012 at 08:19 UTC
when i run code i get two warning Use of uninitialized value $a in print at D:\test.pl line 38. Use of uninitialized value $b in print at D:\test.pl line 38.	[reply]
Re^3: the variable is lost by davido (Cardinal) on Mar 09, 2012 at 08:21 UTC
I only see 19 lines of code. Which line is #38? Update: Thanks for clarifying your code now. Your while loop is reading <$fh> into $_, which is clobbering your foreach loop's version of $_. Since the topic variable in a foreach loop aliases the elements you're iterating over (ie, $a and $b), clobbering $_ clobbers $a and $b. Use an explicitly named topic variable for your foreach loop. Dave	[reply]
Re^4: the variable is lost by cruise (Acolyte) on Mar 09, 2012 at 08:42 UTC
thanks for your help~~~~ i have already know what's wrong with me	[reply]
Re^4: the variable is lost by cruise (Acolyte) on Mar 09, 2012 at 08:26 UTC
i have update my full code ^_^ it is only comment	[reply]
Re^5: the variable is lost by davido (Cardinal) on Mar 09, 2012 at 08:32 UTC

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