#!/usr/bin/perl -w

use strict;

package Superclass;

use vars qw ( $AUTOLOAD );

my $classdata = qq|
{
    my \$self = shift;
    my \$invocations = 0;
    sub _increase {
        \$invocations++;
    }
    sub number {
        return \$invocations;
    }
}|;

sub new {
    my $class = shift;
    if ($class ne __PACKAGE__) {	# he he he
        eval qq|package $class; $classdata |;
    }
    my $self = {};
    bless($self, $class);
    $self->_increase();
    return $self;
}

eval $classdata;

package Subclass;

use vars qw ( @ISA );
@ISA = qw ( Superclass );

package main;

print Superclass->number();
my $one = Superclass->new();
print $one->number();
print Subclass->number();
my $two = Subclass->new();
print $two->number();