2018-11-14

#代码

string name = "";

           string pwd = "";

           //循环体：输入用户名和密码 判断

           //循环条件：输入错误

           do

           {

                Console.WriteLine("请输入用户名");

                name =Console.ReadLine();

                Console.WriteLine("请输入密码");

               pwd =Console.ReadLine();

                if (name != "admin" || pwd != "888888")

                {

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

                }

           }while (name != "admin" || pwd != "888888");

           Console.ReadKey();

#效果