#include <boost/asio.hpp>
#include <iostream>
#include <string>
#include <vector>

int main()
{
    std::vector<std::string> hosts = {"google.com", "yandex.ru"};
    boost::asio::io_service service;
    boost::asio::ip::tcp::resolver resolver(service);
    for (const auto& host: hosts) {
        boost::asio::ip::tcp::resolver::query query(host, "");
        resolver.async_resolve(
                    query,
                    [host](boost::system::error_code ec, boost::asio::ip::tcp::resolver::iterator iter)
        {
            if (ec) {
                std::cout << host << " -> " << ec.message() << std::endl;
                return;
            }
            boost::asio::ip::tcp::resolver::iterator end;
            while (iter != end) {
                auto endpoint = (iter++)->endpoint();
                std::cout << host << " -> " << endpoint.address() << std::endl;
            }

        });
    }
    service.run();

    return 0;
}

for domain in `cat resolv` ; do  nslookup $domain | egrep 'Name|Address' ; done