2018-12-27（五）实现幸运抽奖 1. 需求说明 (1)

实现幸运抽奖

1. 需求说明
   (1) . 登录成功后，用户选择幸运抽奖菜单，进入幸运抽奖功能
   (2) . 输入会员卡号，系统生成5个4位随机数作为幸运数字
   (3) . 如果会员卡号是其中之一，则成为本日幸运会员；否则不是幸运会员

       int max = 99999;
       int min = 1000;
       Random rd = new Random();
       rd.Next(min, max);
       int a = 0;
       int id = 0;
       string user = "";
       string key = "";
       string b = "";
       Console.WriteLine("*****欢迎进入奖客富翁系统*****");
       Console.WriteLine("           1.注册");
       Console.WriteLine("           2.登录");
       Console.WriteLine("           3.抽奖");
       Console.WriteLine("******************************");
       Console.WriteLine("请选择菜单：");
       a = Convert.ToInt32(Console.ReadLine());
       switch (a)
       {
           case 1:
               Console.WriteLine("[奖客富翁系统>注册]");
               Console.WriteLine("请填写用户注册信息:");
               Console.WriteLine("用户名:");
               user = Console.ReadLine();
               Console.WriteLine("密码:");
               key = Console.ReadLine();
               Console.WriteLine("注册成功，请记好你的会员卡号");
               Console.WriteLine("用户名\t\t密码\t\t会员卡号");
               Console.WriteLine("{0}\t\t{1}\t\t{2}", user, key, rd.Next(min, max));
               Console.WriteLine("继续吗?(y/n)");
               b = Console.ReadLine();
               break;
           case 2:
               Console.WriteLine("[奖客富翁系统>登录]");
               Console.WriteLine("请输入用户名:");
               user = "admin";
               key = "123456";
               string yonghu = Console.ReadLine();
               Console.WriteLine("请输入密码:");
               string mima = Console.ReadLine();
               for (int i = 0; i < 4; i++)
               {
                   if (user == yonghu & key == mima)
                   {
                       Console.WriteLine("欢迎您:{0}", yonghu);
                       break;
                   }
                   else
                   {
                       Console.WriteLine("你还剩{0}次机会", 3 - i);
                       continue;
                   }
               }
               break;
           case 3:
               Console.WriteLine("[奖客富翁系统>抽奖]");
               Console.WriteLine("请输入你的卡号");
               id = Convert.ToInt32(Console.ReadLine());
               Console.WriteLine("今日的幸运数字为：");
               for (int i = 0; i < 4; i++)
               {
                   Console.WriteLine(rd.Next(min, max));
               }
               if (rd.Next(min, max) == id)
               {
                   Console.WriteLine("恭喜！你是本日的幸运会员!");
               }
               else
               {
                   Console.WriteLine("抱歉！您不是本日的幸运会员！");
               }
               break;
       }
       Console.WriteLine("继续吗？（y/n）");
       b = Console.ReadLine(); switch (b)
       {
           case "n":
               Console.WriteLine("系统退出，谢谢使用");
               break;
           case "y":
               Console.WriteLine("");
               break;
       }
       Console.ReadKey();