Hello, I just want to the number of the first column to minus the second column. The results are all 0. Thanks in advance!

open(IN1,"tmp01") || die "Cannot open this file";

@lines1 = <IN1>;

open(OUT,">tmp02") || die "Cannot open this file";

for $item1(@lines1){

    chomp $item1;


@tmp1=split(/t+\,$item1/);

$a=$tmp1[1]-$tmp1[0];


    print OUT $a,"\n";



}

close(IN1);

close(OUT);

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In reply to wrong in minus by yueli711

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