第十六课

一、
int i= 0;
string password = "";
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：");
i = Convert.ToInt32(Console.ReadLine());
switch (i)
{
case 1:
Console.WriteLine("[奖客富翁系统>注册]");
break;
case 2:
Console.WriteLine("[奖客富翁系统>登录]");
break;
case 3:
Console.WriteLine("[奖客富翁系统>抽奖]");
break;
}

        Console.ReadKey();

二、
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();