#include <iostream>
#include <boost/asio.hpp>
#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/thread.hpp> 
#include <boost/system/error_code.hpp>
using boost::asio::ip::tcp;
//using boost::asio;
void connect_handler(void);//const boost::system::error_code);
int main()
{
boost::asio::io_service service;
tcp::endpoint ep(boost::asio::ip::address::from_string("127.0.0.1"), 2001);
tcp::socket sock(service);
sock.async_connect(ep, boost::bind(connect_handler));
//sock.connect(ep, connect_handler);
service.run();
}
void connect_handler(void)//const boost::system::error_code & ec)
{
     // here we know we connected successfully
     // if ec indicates success 
     std::cout<<"Connected!"<<std::endl;
}