#!/usr/bin/perl

use strict;
use warnings;

package Obj;

sub new {
    my $class = shift;
    my $self = {};
    bless $self, $class;
    $self->initialize();
    return $self;
}

sub initialize {
    my $self = shift;
    $self->{ a } = 10;
    return $self;
}

package main;

my $obj = Obj->new;
print $obj->{'a'};