#!/usr/bin/perl -w

use strict;

my $uclc    = shift or Usage();
my $infile  = shift or Usage();
my $outfile = shift or Usage();
Usage() unless ($uclc eq 'lc' or 'uc');

open (IN, "< $infile") or die "Error opening $infile for read: $!";
my @in = <IN>;
close IN               or die "Error closing $infile after read: $!";

my @munged;
for(@in) {
   my $munged = lc() if ($uclc eq 'lc');
   $munged    = uc() if ($uclc eq 'uc');
   push @munged, $munged;
   }

open (OUT, "> $outfile") or die "Error opening $outfile for write: $!";
print OUT for(@munged);
close OUT                or die "Error closing $outfile after write: $!";

##########################################################################
sub Usage {
   die "\n Usage: uclc.pl (lc|uc) infile outfile\n";
   }
##########################################################################