#!/usr/bin/perl -w
use strict;
do 'mysub.pm';

# The rest of code

##</code><code>##

#!/usr/bin/perl -w
use strict;
use mysub.pm;

# The rest of code

##</code><code>##


sub mysub1{
  # somecodes
}

sub mysub2{
  # somecodes
}

# some more subroutines