判别整数

int a;             Console.Write("请输入整数:");             a = Convert.ToInt32(Console.ReadLine ());             if (a > 10 && a < 100)             {                 Console.WriteLine("您输入的是俩位数的整数");             }                                   else  if (a < 10)             {                     Console.WriteLine("您输入的数小于10");

}                 else             {                     Console.WriteLine("您输入的数大于100");              }

Console.ReadLine();

Console.WriteLine();             }