This looks like homework to me so I'll make suggestions rather than code

1) Filehandles can be stored in variables too:

my ($fh1, $fh2);
open $fh1, ">GENEID.out" or ...
open $fh2, ">PROTID.out" or ...

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2) Read every line - print every line. You are obviously not doing that.

3) set another Filehandle var '$fh' with the appropriate Filehandle as you detect a change and use your new $fh to store and print to the right file.

In reply to Re: pattern matching to seperate data by snopal
in thread pattern matching to separate data by patric

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