using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace IPFlag

{

    public class Class1

    {

        public bool ISIP(string ip)

        {

            bool b = true;

            string[] lines = new string[];

            string s = ".";

            lines = ip.Split(s.ToCharArray(), );//分隔字符串

            try

            {

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

                {

                    if (Convert.ToInt32(lines[i]) >=  || Convert.ToInt32(lines[i]) < )

                    {

                        b = false;

                        return b;

                    }

                }

                return b;

            }

            catch { return false; }

        }

    }

}