using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 事件_观察者模式_
{
    class Program
    {
        static void Main(string[] args)
        {
            CAT cat = new CAT("TOM","黄色");
            Mouse mouse1 = new Mouse("米奇1", "黑1色",cat);
            Mouse mouse2 = new Mouse("米奇2", "黑2色", cat);
            Mouse mouse3 = new Mouse("米奇3", "黑3色", cat);
            cat.CatComing();
            // cat.CatCome();这如果不是一个事件，是可以在外面调用的，是事件则不能调用。
            Console.ReadKey();
        }
    }
}

    class CAT
    {
        public string name;
        public string color;
        public CAT(string name,string color)
        {
            this.name = name;
            this.color = color;
        }
        public void CatComing()
        {
            Console.WriteLine(color+"的"+name+"进来了！");
            CatCome();
        }
        public event Action CatCome;//这代表示这个CAT类中的事件发布
    }
}

class Mouse
{

          public string name;

public string color;
        public Mouse(string name,string color,CAT cat)
        {
            this.name = name;
            this.color = color;
            cat.CatCome += RunAway;//这表示Mouse类中定阅cat.CatCome(也就是将RunAway()注册到CAT类中的cat.CatCome事件中),
        }
        public void RunAway()
        {
            Console.WriteLine(color+"的"+name+"跑了！");
        }