委托经典面试题

逻辑关系：猫叫一声老鼠就会跑，人会醒
（1）要考虑连动性
（2）要考虑扩展性

using System;

namespace Cat
{
    class Cat
    {
        public delegate void Done();
        public event Done Miao;
        public void Shout()
        {
            Console.WriteLine("猫叫了~");
            Miao();
        }
    }
    class Mouse
    {
        public void Run()
        {
            Console.WriteLine("老鼠跑了~");
        }
    }
    class Person
    {
        public void WakeUp()
        {
            Console.WriteLine("主人醒了");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Cat Tom = new Cat();
            Mouse Jerry = new Mouse();
            Person Kivon=new Person();

            Tom.Miao+=new Cat.Done(Jerry.Run);
            Tom.Miao+=new Cat.Done(Kivon.WakeUp);
            Tom.Shout();
        }
    }
}