Say my code is:
# PRO1.pl
open (MYFILE, 'data.txt');
while (<MYFILE>) {
chomp;
print "$_\n";
}
close (MYFILE);

But I want to run all these from this PRO1.pl program

$ perl PRO1.pl part1.txt
$ perl PRO1.pl part2.txt
$ perl PRO1.pl part3.txt

What do I change 'data.txt' so I can use any text file with this program.

__________________

---