Just goofing around Boost ASIO library . The following is the first attempt to mess with it.

sample_asio.cpp

// You also need to link pthread and boost_system in order to run it. The following will be the command , if you are too lazy to 
// type
// $ g++ sample_asio.cpp -o asio -lpthread -lboost_system
// 

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

using namespace std;

void handler(const boost::system::error_code &ec) 
{ 
  cout << "printing after 5 sec";
} 

int main() 
{ 
  boost::asio::io_service io_service; 
  boost::asio::deadline_timer timer(io_service, boost::posix_time::seconds(5)); 
  timer.async_wait(handler); 
  io_service.run(); 
  
}