Sorry, forgot to clarify, I am using Windows command prompt. I am looking for how to do this in the code. For example:

while ($input){
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Only that doesn't work.

# usage:
# script.pl /path/to/infile /path/to/outfile

die "infile not defined\n"  if (! defined $ARGV[0]) ;
die "outfile not defined\n" if (! defined $ARGV[1]) ;

open my $infile, "< $ARGV[0]"  or die "can't read $ARGV[0]\n" ;
open my $outfile, "> $ARGV[1]" or die "can't write $ARGV[1]\n" ;
while (<$infile>) {
  chomp ;
  print $outfile "=>$_<\n" ;
}
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