/* * This file is part of MXE. See LICENSE.md for licensing information. */  //  Taken from: http://zguide.zeromq.org/cpp:hwserver//  Hello World server in C++//  Binds REP socket to tcp://*:5555//  Expects "Hello" from client, replies with "World"//#include <zmq.hpp>#include <string>#include <iostream>#ifndef _WIN32#include <unistd.h>#else#include <windows.h> #define sleep(n)    Sleep(n)#endif int main () {    //  Prepare our context and socket    zmq::context_t context (1);    zmq::socket_t socket (context, ZMQ_REP);    socket.bind ("tcp://*:5555");     while (true) {        zmq::message_t request;         //  Wait for next request from client        socket.recv (&request);        std::cout << "Received Hello" << std::endl;         //  Do some 'work'        sleep(1);         //  Send reply back to client        zmq::message_t reply (5);        memcpy (reply.data (), "World", 5);        socket.send (reply);    }    return 0;}