if ($test1 = $test2) {
   $comp = "EQUALS";
}  else  {
   $comp = "Does NOT Equal";
}

##</code><code>##

my $test1 = 123;
my $test2 = 456;
print "1. Test1: '$test1', test2: '$test2'\n";
if ($test1 = $test2) {
   print "2a. Test1: '$test1', test2: '$test2'\n";
   $comp = "EQUALS";
}  else  {
   print "2b. Test1: '$test1', test2: '$test2'\n";
   $comp = "Does NOT Equal";
}
print "3. Test1: '$test1', test2: '$test2'\n";

##</code><code>##

=head2 C<decode_COMP3>

Decodes a COMP3 BCD-number with trailing sign

=cut

sub decode_COMP3 {
    # Cut off the last nibble
    # 0C -> +
    # 0D -> -
    # 0F -> (unsigned number)
    my $digits = unpack "H*", $_[0];
    my $sign = chop $digits;
    #print "$digits\n";
       if ($sign eq 'D' or $sign eq 'd') { $sign = '-' }
    elsif ($sign eq 'C' or $sign eq 'c') { $sign = '+' }
    elsif ($sign eq 'F' or $sign eq 'f') { $sign = ' ' }
    else { $digits .= $sign; $sign = '?' };
    "$sign$digits"
};

##</code><code>##

sub decode_BCD {
    unpack "H*", $_[0];
};

##</code><code>##

use strict;
use Test::More tests => 4;
use_ok 'MyBCDDecodePackage';

is decode_BCD("\x12\x34\x56","123456");
is decode_BCD("\x00\x34\x56","003456");
is decode_BCD("\x12","12");