Then you have problem with algorithm parsing files? Because opening multiple files is simple, you just use different file handles: 
open FH, "file1" or die $!;
open FH2, "file2" or die $!;

$readlinefromfile1 = <FH>;
$readlinefromfile2 = <FH2>;
$readfromfile1again = <FH;

close FH2;
close FH;

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In reply to Re^3: Parsing multiple excel files in perl by grizzley
in thread Parsing multiple excel files in perl by reaper9187

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