boost.asio学习-----reslover 域名解析

将域名解析为ip地址并输出：

 #include "stdafx.h"
 #include "boost/asio.hpp"
 #include <boost/lexical_cast.hpp>

 using namespace std;
 using namespace boost::asio;

 int _tmain(int argc, _TCHAR* argv[])
 {
     boost::asio::io_service ios;
     //创建resolver对象
     ip::tcp::resolver slv(ios);
     //创建query对象
     ip::tcp::resolver::query qry("www.google.com", boost::lexical_cast<string>());
     //使用resolve迭代端点
     ip::tcp::resolver::iterator it = slv.resolve(qry);
     ip::tcp::resolver::iterator end;
     vector<string> ip;
     for (; it != end; it++)
     {
         ip.push_back((*it).endpoint().address().to_string());
     }

     for (int i = ; i < ip.size(); i++)
     {
         cout << ip[i] << endl;
     }
     getchar();
     return ;
 }