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>(0));
    //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 = 0; i < ip.size(); i++)
    {
        cout << ip[i] << endl;
    }
    getchar();
    return 0;
}