1 //0成功 1失敗 2異常 3正常 4上線 5下線 2 while (true) 3 { 4 Console.Write("請輸入a的值:"); 5 int a = Convert.ToInt32(Console.ReadLine()); 6 Console.WriteLine(a == 0 ? "成功" : (a == 1 ? "失敗" : (a == 2 ? "異常" : (a == 3 ? "正常" : (a == 4 ? "上線" : (a == 5 ? "下線" : "未知")))))); 7 }