using System;

public class Program

{

    public static void Main()

    {

        string userName="";

        string password="";

        do

        {

            Console.WriteLine("输入帐号");

            userName=Console.ReadLine();

            Console.WriteLine("输入密码");

            password=Console.ReadLine();

            if(userName=="admin"&&password=="888888")

            {

            Console.WriteLine("登入成功");

            }

            else

            {

            Console.WriteLine("用户名密码错误");

            }

​

        }while(userName!="admin"&&password!="888888");

    }

}