the test does not work properly! 
use strict;
use warnings;

use Test::More tests => 2;

my $bool;
sub odd { return $_[0] % 2; }

$bool = (odd(3) && !odd(4)) || (!odd(3) && !odd(1));
ok ($bool, "First call is true");
$bool = (odd(3) && !odd(5)) || (!odd(3) && !odd(1));
ok (!$bool, "Second call is false");

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"It doesn't work" is as useful to a developer as "I'm ill" is to a medic. Try to be specific. SSCCE is best.

In reply to Re^5: Evaluate arbitrary boolean expressions by hippo
in thread Evaluate arbitrary boolean expressions by gauss76

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