判断用户输入的是否为0-9中的数字

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 

namespace hhhhhhh

{

    class Program

    {

        static void Main(string[] args)

        {

            String[] Num = new String[10] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };

            Console.WriteLine("请输入一个数字：");

            String s = Console.ReadLine();

            bool b = false;

            for (int i = 0; i <= 9; i++)

            {

                if (s == Num[i])

                {

                    b = true;

                }

            }

            if (b)

                Console.WriteLine("您输入了一个数字:{0}", s);

            else

                Console.WriteLine("您输入的不是数字！");

        }

    }

}