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