Without using any modules. 
use strict;
use warnings;

use v5.16;

my $infile;
my $outfile;

if ($#ARGV <= 2 || $#ARGV >= 4){
die "Silly you, there are an incorrect amount of args :)\n" 
}

for ( 0 .. $#ARGV / 2 ) { 
    my $switch = shift(@ARGV);
    my $value = shift(@ARGV);

    given ($switch) {
        when ('-f1')   { $infile = $value }
        when ('-f2')   { $outfile = $value }
    }
}

print "Infile: $infile\n", "Outfile: $outfile";

[download]
Update: changed 'if ($#ARGV % 2 == 0)' to 'if ($#ARGV <= 2 || $#ARGV >= 4)'

In reply to Re: GetOpts not working: by james28909
in thread GetOpts not working: by finfan

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