bool flag=true;
do {
Console.WriteLine("*****欢迎来到富翁抽奖界面*****");
Console.WriteLine("\t1.注册\n\t2.登录\n\t3.抽奖");
Console.WriteLine("******************************");
Console.WriteLine("请选择菜单:");
string vxx = Console.ReadLine();
int num = Convert.ToInt32(vxx);
switch (num)
{
case 1:
Console.WriteLine("您已经入注册界面");
break;
case 2:
Console.WriteLine("您已经入登入界面");
break;
case 3:
Console.WriteLine("您已经入抽奖界面");
break;
}
Console.Write("继续吗？（yes/no）");
string answer = Console.ReadLine();
if(answer=="yes"){flag=true;
}
else { flag = false; }
}while (flag);
Console.ReadKey();
}