C#题编写一个进行加减乘除四则运算的程序，要求；输出2个单精度数，然后输入一个运算符号，输出2个单精度

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("请输入两个数：");
            Console.WriteLine("add="+Add.add(Int32.Parse( Console.ReadLine()),Int32.Parse( Console.ReadLine())));
            Console.WriteLine("请输入两个数：");
            Console.WriteLine("less=" + Less.less(Int32.Parse(Console.ReadLine()), Int32.Parse(Console.ReadLine())));
            Console.WriteLine("请输入两个数：");
            Console.WriteLine("Multiply="+Multiply.multiply (Int32.Parse( Console.ReadLine()),Int32.Parse( Console.ReadLine())));
            Console.WriteLine("请输入两个数：");
            Console.WriteLine("Divided="+Divided.divided (Int32.Parse( Console.ReadLine()),Int32.Parse( Console.ReadLine())));
            Console.ReadLine();
        }
        class Add
        {
            public static int add(int a, int b) { return (a + b); }

        }
        class Less
        {
            public static int less(int a, int b) { return (a - b); }
        }
        class Multiply
        {   public static int multiply(int a, int b){return (a * b);}
          
        }class Divided
             {
            public static int divided(int a, int b){return (a / b);}
        }
         
     }
 }

....太简单了..真的不想弄..你是只想实现这个功能?还是采用更符合标准的?
你不给分 我才不给你写,虽然说写一个这个大概得10分钟吧~