效果

image.png

代码

string cd = "";
            string sf = "y";
            string yhm = "";
            string mm = "";
            string yhm1 = "";
            string mm1 = "";
            int max = 99999;
            int min = 1000;
            Random rd = new Random();
            int rdnum =0;
            bool zc = false;
            bool dlcg = false;
            bool xysz = false;
            do
            {
                
                Console.WriteLine(@"*****欢迎进入奖客富翁系统*****
            1.注册
            2.登录
            3.抽奖
******************************");
                Console.Write("请选择菜单:");
                cd = Console.ReadLine();
                switch (cd)
                {
                    case "1":
                        Console.WriteLine("奖客富翁系统>注册");
                        Console.WriteLine("请填写个人注册信息");
                        Console.Write("用户名:");
                        yhm = Console.ReadLine();
                        Console.Write("密码:");
                        mm = Console.ReadLine();
                        Console.WriteLine("注册成功,记好你的会员卡号");
                        Console.WriteLine("用户名 密码 会员卡号");
                        rdnum = rd.Next(min, max);
                        Console.WriteLine("{0} {1} {2}",yhm,mm,rdnum);
                        zc = true;
                        break;
                    case "2":
                        if (zc == true)
                        {
                            Console.WriteLine("奖客富翁系统>登录");
                            Console.Write("用户名:");
                            yhm1 = Console.ReadLine();
                            Console.Write("密码:");
                            mm1 = Console.ReadLine();
                            if (yhm1 == yhm || mm1 == mm)
                            {
                                Console.WriteLine("欢迎你{0}", yhm);
                                dlcg = true;
                            }
                            else
                            {
                                Console.WriteLine("用户名密码错误");
                                dlcg = false;
                            }
                        }
                        else
                        {
                            Console.WriteLine("先注册");
                        }
                        break;
                    case "3":
                        if (dlcg == true)
                        {
                            Console.WriteLine("奖客富翁系统>抽奖");
                            Console.WriteLine("你的会员卡号是{0}", rdnum);
                            Console.WriteLine("今天的幸运数字是");
                            for (int i = 0; i < 5; i++)
                            {
                                int[] df = new int[5];
                                df[i] = rd.Next(min, max);
                                Console.Write(df[i]+" ");
                                if (rdnum == df[i])
                                {
                                    xysz = true;
                                }
                            }
                            if (xysz == true)
                            {
                                Console.WriteLine("是幸运数字");
                            }
                            else
                            {
                                Console.WriteLine("不是幸运数字");
                            }
                            xysz = false;
                        }
                        else
                        {
                            Console.WriteLine("先登录");
                        }
                        break;
                    default:
                        Console.WriteLine("您的输入有误！");
                        break;
                }
                    Console.Write("继续吗?(y/n):");
                        sf = Console.ReadLine();
                        if (sf=="y")
                        {
                        }
                        else if (sf == "n")
                        {
                            Console.WriteLine("退出系统谢谢使用");
                        }
                        else
                        {
                            Console.WriteLine("输入错误等于退出");
                            Console.WriteLine("退出系统谢谢使用");
                            sf = "n";
                        }
                } while (sf=="y");
            Console.ReadKey();