C# 委托：把方法组合到一个数组中使用

Posted 2022-03-29 siny0

C# 委托：把方法组合到一个数组中使用

2016年04月28日 16:12:55 kernel_main 阅读数 1129

 

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

namespace ConsoleApplication1

    class MathOperations
    
        public static double MultiplyByTwo(double value)
        
            return value * 2;
        

        public static double Square(double value)
        
            return value * value;
        
    

    delegate double DoubleOpt(double x);

    class Program
    
        public enum TimeOfDay
        
            Morning = 0,
            Afternoons = 1,
            Evening = 2
        

        static void Main(string[] args)
        
            DoubleOpt[] opt = 
                                  MathOperations.MultiplyByTwo,
                                  MathOperations.Square
                              ;

            for (int i = 0; i < opt.Length;i++ )
            
                System.Console.WriteLine("Using Options [0]:",i);
                ProcessAndDisplayNumber(opt[i], 2.0);
                ProcessAndDisplayNumber(opt[i], 7.94);
                ProcessAndDisplayNumber(opt[i], 1.414);
                Console.WriteLine();
            
        

        static void ProcessAndDisplayNumber(DoubleOpt opt,double value)
        
            double result = opt(value);
            System.Console.WriteLine("Value is 0, result of operation is 1",
                value,result);