委托,事件(猫,鼠,人联动事类)

using System;
 using System.Collections.Generic;
 using System.Text;namespace CatMouse
 {
     class MainClass
     {
         static void Main(string[] args)
         {
             Cat cat = new Cat("cat1");
             Master ma = new Master("ivan");
             Mouse ms = new Mouse("jerry");
             cat.Cry += new Cat.CryEventHandler(ms.Response); //为事件添加事件处理程序
             cat.Cry += new Cat.CryEventHandler(ma.Response);
             cat.OnCry();       //猫叫
         }
     }
     class Cat
     {
         public delegate void CryEventHandler(object o, EventArgs e); //声明Delegate
         public event CryEventHandler Cry;                           //定义Event
         private string m_name;
         public Cat(string name)
         {
             m_name = name;
         }
         public void OnCry()
         {
             if (Cry != null)
             {
                 Cry(this, EventArgs.Empty);          //触发事件
             }
         }
     }
     public class Master
     {
         private string m_name;
         public Master(string name)
         {
             m_name = name;
         }
         public void Response(object o, EventArgs e)
         {
             Console.WriteLine(m_name + "wake up");
         }
     }
     public class Mouse
     {
         private string m_name;
         public Mouse(string name)
         {
             m_name = name;
         }
         public void Response(object o, EventArgs e)
         {
             Console.WriteLine(m_name + "flee away");
         }
     }}