Consider what happens when something in the first file does not match anything in the second file...

Your inner loop spins through the second file until it reaches EOF. None of the other lines in the first file are going to match, because there is nothing more to match against.

One option would be to seek back to the beginning of the second file after each match, to ensure you are comparing against all the possibilities.
You might also consider loading both files into arrays so that you have less disk I/O to slog through. The downside is that it will guzzle down memory to have the entire file read in at once.

In reply to Re: nested loops to compare 2 files is only looping a limited number of times. by SuicideJunkie
in thread nested loops to compare 2 files is only looping a limited number of times. by stevemayes

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