static void Main(string[] args)
{
Duck duck = new SimpleDuck();
duck.Display();
duck.Fly();
duck.Quack();
duck = new RubberDuck();
duck.Display();
duck.Fly();
duck.Quack();
Console.ReadLine();
}
static void Main(string[] args)
{
Duck duck = null;
duck = new BigYellow();
duck = new MallardDuck();
duck = new RubberDuck();
duck = new SpaceDuck();
duck.display();
duck.fly();
duck.quack();
Console.ReadKey();
}
static void Main(string[] args)
{
Duck duck = new RubberDuck();
//说出名字
duck.display();
//飞行
duck.performFly();
//叫
duck.performQuack();
//动态改变行为
duck.setFlyBehavior(new FlyWithWings());
//说出名字
duck.display();
//飞行
duck.performFly();
//叫
duck.performQuack();
//动态改变行为
}
