C#委托实例

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace weituo

{

class Program

{

static void Main(string[] args)

{

// 声明委托变量

ProcessDelegate process;

Console.WriteLine("请输入用逗号分隔的两个数字：");

string input = Console.ReadLine();

int commaPos = input.IndexOf(',');

double param1 = Convert.ToDouble(input.Substring(0, commaPos));

double param2 = Convert.ToDouble(input.Substring(commaPos + 1,input.Length - commaPos -1));

Console.WriteLine("输入M乘法D除法");

input =Console.ReadLine();

// 初始化委托变量

if(input =="M")

process = new ProcessDelegate(Multiply);

//注释：此处也可以写process = Multiply

else

process = new ProcessDelegate(Divide);

// 使用委托调用函数

double result = process(param1,param2);

Console.WriteLine("结果:{0}",result);

Console.ReadKey();

}

// 声明委托

delegate double ProcessDelegate(double param1,double param2);

static double Multiply(double param1, double param2)

{

return param1 * param2;

}

static double Divide(double param1, double param2)

{

return param1 / param2;

}

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