代码

namespace 训练三
{
class Program
{
static void Main(string[] args)
{
try
{
string num;
do
{
Console.WriteLine("******欢迎进入奖客富翁系统********");
Console.WriteLine("\t 1.注册");
Console.WriteLine("\t 2.登入");
Console.WriteLine("\t 3.抽奖");
Console.WriteLine("******************************");
Console.Write("请选择菜单：");
int sum = Convert.ToInt32(Console.ReadLine());
if (sum == 1)
{
Console.WriteLine("奖客富翁系统----注册");
Console.WriteLine("请填入你的个人注册信息");
Console.Write("用户名：");
string name = Console.ReadLine();
Console.Write("密码：");
string mima = Console.ReadLine();
Console.WriteLine("注册成功，请记好您的会员卡号");
int max = 99999999;
int min = 10000000;
Random rd = new Random();
int shu=rd.Next(min, max);

                    Console.WriteLine("用户名\t密码\t会员卡号");
                    Console.WriteLine("{0}\t{1}\t{2}",name,mima,shu);

                }
                else if (sum == 2)
                {
                    Console.WriteLine("奖客富翁系统----登入");
                    Console.Write("请输入用户名：");
                    string Name = Console.ReadLine();
                    Console.Write("请输入密码：");
                    string Mima = Console.ReadLine();
                    Console.WriteLine();
                    Console.WriteLine("欢迎你{0}",Name);
                }
                else if (sum == 3)
                {
                    Console.WriteLine("奖客富翁系统----抽奖");
                    Console.Write("请输入你的会员卡号:");
                    int shu = Convert.ToInt32(Console.ReadLine());
                    int max = 99999999;
                    int min = 10000000;
                    Random rd = new Random();
                    int yi = rd.Next(min, max);
                    int er = rd.Next(min, max);
                    int san = rd.Next(min, max);
                    int si = rd.Next(min, max);
                    int wu = rd.Next(min, max);
                    Console.WriteLine("{0}\t{1}\t{2}\t{3}\t{4}", yi, er, san, si, wu);
                    if (shu == yi) 
                    {
                        Console.Write("您是本次的幸运会员");
                    }
                    else if (shu == er)         
                    {
                        Console.Write("您是本次的幸运会员");
                    }
                    else if (shu == san) 
                    {
                        Console.Write("您是本次的幸运会员");

                    }
                    else if (shu == si) 
                    {
                        Console.Write("您是本次的幸运会员");
                    }
                    else if (shu == wu)
                    {
                        Console.Write("您是本次的幸运会员");
                    }
                    else 
                    {
                        Console.Write("抱歉，您不是本次的幸运会员");
                    }
                }
                else
                {
                    Console.Write("你的输入有误");
                }
                Console.Write("是否继续(y/n):");
                num = Console.ReadLine();
                if (num == "n")
                {
                    Console.Write("程序退出，谢谢使用");
                }
            }
            while (num == "y");
        }
        catch
        {
            Console.Write("您的输入有误");
        }
    }
}

}