帮忙看个正则

Question

            string strIp = "0.0.0.0         0.255.255.255   IANA保留地址  CZ88.NET";            //刚接触正则，想分为3组 写的有点问题 帮忙修改下 谢谢了
            Regex reg = new Regex(@"(.+\s+)(.+\s+)(.+\s.+)");
            Match mat = reg.Match(strIp);
            if (mat.Success)
            {
                string str1 = mat.Groups[1].Value;
                string str2 = mat.Groups[2].Value;
                string str3 = mat.Groups[3].Value;
            }

Answer 1

//第一组：0.0.0.0         
//第二组：0.255.255.255   
//第三组：IANA保留地址  CZ88.NET

Answer 2

static void Main(string[] args)
            {                string strIp = "0.0.0.0         0.255.255.255   IANA保留地址  CZ88.NET";
                Regex reg = new Regex(@"([^\s]+)\s*([^\s]+)\s*(.*)", RegexOptions.None);
                Match mat = reg.Match(strIp);
                if (mat.Success)
                {
                    string str1 = mat.Groups[1].Value;
                    string str2 = mat.Groups[2].Value;
                    string str3 = mat.Groups[3].Value;
                    Console.WriteLine(str1);
                    Console.WriteLine(str2);
                    Console.WriteLine(str3);
                }
                            Console.ReadLine();
                                              
            }

Answer 3

 string strIp = "0.0.0.0         0.255.255.255   IANA保留地址  CZ88.NET";            //刚接触正则，想分为3组 写的有点问题 帮忙修改下 谢谢了
            Regex reg = new Regex(@"([\d.]*)\s*([\d.]*)\s*(.*)");
            Match mat = reg.Match(strIp);
            if (mat.Success)
            {
                string str1 = mat.Groups[1].Value;
                string str2 = mat.Groups[2].Value;
                string str3 = mat.Groups[3].Value;
            }