四则运算

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("四则运算答题");
    
                int a, b, d, c1,c2,t=0;
                Random rnd = new Random();
                do
                {
                   
                    a = rnd.Next(1, 10);
                    b = rnd.Next(1, 10);
                    d = rnd.Next(1, 4);
                    t++;
                    Console.WriteLine("第{0}题：",t);

                    if (d == 1)
                    {
                        c1 = a * b;
                        Console.WriteLine("{0}x{1}=", a, b );
                        Console.WriteLine("请计算答案:");
                        c2 = int.Parse( Console.ReadLine());
                        if (c2 == c1)
                            Console.WriteLine("计算正确,按Enter进行下一题");
                        else
                            Console.WriteLine("计算错误，正确结果为：{0}。按Enter进行下一题", c1);
                    }
                    else if (d == 2)
                        if (a >= b)
                        {
                            c1 = a / b;
                            Console.WriteLine("{0}/{1}=", a, b);
                            Console.WriteLine("请计算答案:");
                            c2 = int.Parse(Console.ReadLine());
                            if (c2 == c1)
                                Console.WriteLine("计算正确,按Enter进行下一题");
                            else
                                Console.WriteLine("计算错误，正确结果为：{0}。按Enter进行下一题", c1);
                        }
                        else
                        {
                            c1 = b / a;
                            Console.WriteLine("{0}/{1}=", a, b);
                            Console.WriteLine("请计算答案:");
                            c2 = int.Parse(Console.ReadLine());
                            if (c2 == c1)
                                Console.WriteLine("计算正确,按Enter进行下一题");
                            else
                                Console.WriteLine("计算错误，正确结果为：{0}。按Enter进行下一题", c1);
                        }

                    else if (d == 3)
                    {
                        c1 = a + b;
                        Console.WriteLine("{0}+{1}=", a, b);
                        Console.WriteLine("请计算答案:");
                        c2 = int.Parse(Console.ReadLine());
                        if (c2 == c1)
                            Console.WriteLine("计算正确,按Enter进行下一题");
                        else
                            Console.WriteLine("计算错误，正确结果为：{0}。按Enter进行下一题", c1);
                      
                    }
                    else if (d == 4)
                    {
                        c1 = a - b;
                        Console.WriteLine("{0}-{1}=", a, b);
                        Console.WriteLine("请计算答案:");
                        c2 = int.Parse(Console.ReadLine());
                        if (c2 == c1)
                            Console.WriteLine("计算正确,按Enter进行下一题");
                        else
                            Console.WriteLine("计算错误，正确结果为：{0}。按Enter进行下一题", c1);

                    }

                }
                while (Console.ReadLine()!="10000000000000");
 
            Console.Read();
        }
    }
}

 

 

不会用窗口做，只能用控制台做了