Request-reply service in C++

//
// Request-reply service in C++
// Connects REP socket to tcp://localhost:5560
// Expects "Hello" from client, replies with "World"
//
// Olivier Chamoux <moc.puorgselaht.rf|xuomahc.reivilo#moc.puorgselaht.rf|xuomahc.reivilo>

#include "zhelpers.hpp"

int main (int argc, char *argv[])
{
zmq::context_t context(1);

zmq::socket_t responder(context, ZMQ_REP);
responder.connect("tcp://localhost:5560");

while(1)
{
// Wait for next request from client
std::string string = s_recv (responder);

std::cout << "Received request: " << string << std::endl;

// Do some 'work'
sleep (1);

// Send reply back to client
s_send (responder, "World");

}
}