HeadFirst设计模式---策略模式 C#实现

class Duck
    {
        protected IFlyBehavior flyBehavior;
        protected IQuackBehavior quackBehavior;

        public void PerformQuack()
        {
            quackBehavior.Quack();
        }
        public void PerformFly()
        {
            flyBehavior.Fly();
        }
    }

interface IFlyBehavior
    {
        void Fly();
    }

interface IQuackBehavior
    {
        void Quack();
    }

class FlyNoWay : IFlyBehavior
    {
        public void Fly()
        {
            Console.WriteLine("不会飞");
        }
    }

public class FlyWithWings : IFlyBehavior
    {
        public void Fly()
        {
            Console.WriteLine("飞");
        }
    }

class MallardDuck:Duck
    {
        public MallardDuck()
        {
            quackBehavior = new MuteQuack();
            flyBehavior = new FlyWithWings();
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            MallardDuck mallardDuck = new MallardDuck();
            mallardDuck.PerformFly();
            mallardDuck.PerformQuack();
            Console.ReadKey();
        }
    }