c#委托和事件

本文参考了鹏哥的c#视频教学，在此谢过！

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using 烧水;

namespace 委托和事件
{
    public delegate void Greeting(string name);
    class Program
    {
        public static void ChineseGreeting(string name)
        {
            Console.WriteLine("早上好：" + name);
        }
        public static void EnglishGreeting(string name)
        {
            Console.WriteLine("Morning：" + name);
        }
        static void Main(string[] args)
        {
            //heater heat = new heater();
            //alarm alert = new alarm();
            //display disp = new display();
            //heat.BoilEvent += alert.MakeAlert;
            //heat.BoilEvent += disp.ShowMsg;
            //heat.BoilWater();

            Greeting greet = new Greeting(ChineseGreeting);
            greet += EnglishGreeting;
            greet("tom");

        }
    }
}
namespace 烧水
{
   public class heater
    {
        private int temperature = 0;
        public delegate void BoilHandler(int param);//定义一个委托
        public event BoilHandler BoilEvent;//定义事件

        public void BoilWater()
        {
          
            for (int i = 0; i <=100; i++)
            {
                temperature++;
                if (i >=99 && BoilEvent != null)
                {

                    BoilEvent(--temperature);
                    return;

                }
            }
        }
    }

    public  class alarm
    {
        public void MakeAlert(int param)
        {
            Console.WriteLine("响铃：水快开了，当前温度：" + param.ToString());
        }
    }

    public class display
    {
        public void ShowMsg(int param)
        {
            Console.WriteLine("显示当前温度为：" + param.ToString());
        }
    }
}