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

namespace TestConsoleFramwork
{
    internal class Program
    {
        //一、创建委托类
        public delegate int CalHandler(int x, int y);
        //二、创建具体的委托方法
        static int Jia(int x,int y) {
            return x + y;
        }
        static int Jian(int x, int y)
        {
            return x - y;
        }

        static void Main(string[] args)
        {
            //三、在方法内生成为方法的委托对象
            CalHandler JiaHandler = new CalHandler(Jia);
            CalHandler JianHandler = new CalHandler(Jian);
            //四、使用委托对象.Invoke方法执行具体的方法
            int a=JiaHandler.Invoke(3,4);
            int b=JianHandler.Invoke(5,6);
            Console.WriteLine(a);
            Console.WriteLine(b);
            //五、也可以使用,两种效果一样
            int c = JiaHandler(3,4);
            int d=JianHandler.Invoke(5,6);
            Console.WriteLine(c);
            Console.WriteLine(d);
            Console.Read();

            //给委托赋值
            CalHandler JiaHandler3 = Jia;
            CalHandler JianHandler4 = Jian;
            Console.WriteLine(JiaHandler3(3, 4));
            Console.WriteLine(JianHandler4(3, 4));
            Console.WriteLine("aaaa");
            Console.Read();
        }
    }
}