2018-12-27

        string mima = ""; string name = "";
        bool xuanzhe = true;
        while (xuanzhe)
        {
            Console.WriteLine("****欢迎登入奖客富翁系统*******\n\t1.注册\n\t2.登入\n\t3.抽奖\n*******************************");
            Console.Write("请选择菜单：");
            int choose = Convert.ToInt32(Console.ReadLine());
            switch (choose)
            {
                case 1:
                    Console.WriteLine("[奖客富翁系统>注册]");
                    Console.WriteLine("请注册个人信息");
                    Console.Write("用户名：");
                    name = Console.ReadLine(); 
                    Console.Write("密码：");
                    mima = Console.ReadLine();
                    Random huiyuan = new Random();
                    Console.WriteLine("注册成功，请记好您的会员卡号\n用户名\t密码\t会员卡号\n{0}\t{1}\t{2}",name ,mima, huiyuan.Next(1000,99999));
                    break;
                case 2:
                    Console.WriteLine("[奖客富翁系统>登入]"); 
                    string sr_mima = ""; string sr_name = "";
                    bool judge = false;int n=1;
                    while (!judge )
                    {
                        Console.Write("请输入用户名：");
                        sr_name = Console.ReadLine();
                        Console.Write("请输入密码：");
                        sr_mima = Console.ReadLine();
                        if (sr_name != name || sr_mima != mima)
                        {
                            Console.WriteLine("输入有误，请重新输入"); n++;
                            if (n > 3)
                            {
                                Console.WriteLine("您输入错误次数超过3次，系统退出"); return;
                            }
                        }
                        else { Console.WriteLine("欢迎您：{0}", name); judge = true; }
                    }
                    break;
                default:
                    string sr_huiyuan = "";
                    Console.WriteLine("[奖客富翁系统>抽奖]"); 
                    Console.Write("请输入会员卡号：");
                    sr_huiyuan = Console.ReadLine();
                    Random zj_huiyuan = new Random();
                    int[] lucknum = new int[5];
                    for (int i = 0; i < 5; i++)
                    {
                        lucknum[i]=zj_huiyuan.Next(1000, 99999);
                    }
                    int index = Array.IndexOf(lucknum, sr_huiyuan);
                    if (index == -1)
                    {
                        Console.WriteLine("很遗憾，您没有中奖");
                    }
                    else
                    {
                        Console.WriteLine("恭喜您，中奖了");
                    }
                    
                    Console.WriteLine("");
                    break;
            }
            Console.Write("继续吗？（y/n）");
            if (Console.ReadLine() == "n")
            { Console.WriteLine("系统退出，谢谢使用"); xuanzhe = false; }
            else { continue; }
        }

        Console.ReadKey();

image.png