c#委托实例
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// 委托使用例子// 节选自《C#入门经典》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; } }} |
