asfman
android developer
posts - 90,  comments - 213,  trackbacks - 0

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

namespace ConsoleApplication2
{
    class Program
    {
        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;
        }

        static void Main(string[] args)
        {
            ProcessDelegate process;
            Console.WriteLine("Enter 2 numbers separated with a comma:");
            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("Enter M to multiply or D to divide:");
            input = Console.ReadLine();
            if (input == "M")
                process = new ProcessDelegate(Multiply);
            else
                process = new ProcessDelegate(Divide);
            Console.WriteLine("Result: {0}", process(param1, param2));
            Console.ReadKey();
        }
    }

}

posted on 2007-02-02 15:49 汪杰 阅读(745) 评论(0)  编辑 收藏 引用 所属分类: net
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