The words 'It doesn't work' aren't generally the best ones to use when attempting to precisely define your problem :), but it looks like the *main* problem here is that your 'read the KEY file' loop is inside your 'read the DATA file' loop, so KEY only gets read the first time through, then is 'exhausted'. As KEY is small, it'd be easy to read it into an array first.

Forgive the emphasis, but have you seen arrays? Very handy - they save you having to type "$c1,$c2,$c3...". Have a look at how "my @fields = split(/ /)" might help you cut down the amount of 'noise' here, which would help you analyse your poblem a little better.

Cheers
Ben.

In reply to Re: How to compare a field in 2 files and set a value if it matches? by benn
in thread How to compare a field in 2 files and set a value if it matches? by aschroh

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