#!/usr/bin/perl --
print "Enter a number\n";
chomp( $a = <stdin> );
warn ">>> a($a)b($b)c($c)big($big)equal($equal) ";

print "Enter second number\n";
chomp( $b = <stdin> );
warn ">>> a($a)b($b)c($c)big($big)equal($equal) ";

print "Enter third number\n";
chomp( $c = <stdin> );
warn ">>> a($a)b($b)c($c)big($big)equal($equal) ";

$big   = 0;
$equal = 0;
if ( $a eq $b ) {
    $big   = $a;
    $equal = $a;
}
elsif ( $a > $b ) {
    $big = $a;
}
else {
    $big = $b;
}

warn ">>> a($a)b($b)c($c)big($big)equal($equal) ";

if ( $equal eq $c ) {
    print "All numbers are same";
}
elsif ( $big < $c ) {
    $big = $c;
}
else {
    print "The biggest number is $big \n";
}

warn ">>> a($a)b($b)c($c)big($big)equal($equal) ";

__END__
Enter a number
1
>>> a(1)b()c()big()equal()  at - line 4, <stdin> line 1.
Enter second number
2
>>> a(1)b(2)c()big()equal()  at - line 8, <stdin> line 2.
Enter third number
3
>>> a(1)b(2)c(3)big()equal()  at - line 12, <stdin> line 3.
>>> a(1)b(2)c(3)big(2)equal(0)  at - line 27, <stdin> line 3.
>>> a(1)b(2)c(3)big(3)equal(0)  at - line 39, <stdin> line 3.