2018-11-14

要求用户输入用户名和密码，只要不是admin、888888就一直提示用户名或密码错误,请重新输入

 string user ="";
 string key = "";
 do
 {
 Console.WriteLine("请输入用户名：");
 user = Console.ReadLine();
 Console.WriteLine("请输入密码：");
 key = Console.ReadLine();
 if (user != "admin" & key != "888888")
 {
     Console.WriteLine("用户名密码错误");
 }
 } while (user != "admin" || key != "888888");
 Console.ReadKey();