Console.WriteLine("请输入选项：");
            int Num = Convert.ToInt32(Console.ReadLine());
             while (Num != 4)
             {
                 Console.WriteLine("请输入选项：");
                 Num = Convert.ToInt32(Console.ReadLine());
                 switch (Num)
                 {
                     case 1:
                         Console.WriteLine("なのと");
                         break;
                     case 2:
                         Console.WriteLine("イタチ");
                         break;
                     case 3:
                         Console.WriteLine("かかシ");
                         break;
                     case 4:
                         Console.WriteLine("Over");
                         break;
                 }

             }
            Console.ReadLine();