Lazy Pirate server in C++

//
// Lazy Pirate server
// Binds REQ socket to tcp://*:5555
// Like hwserver except:
// - echoes request as-is
// - randomly runs slowly, or exits to simulate a crash.
//
#include "zhelpers.hpp"

int main ()
{
srandom ((unsigned) time (NULL));

zmq::context_t context(1);
zmq::socket_t server(context, ZMQ_REP);
server.bind("tcp://*:5555");

int cycles = 0;
while (1) {
std::string request = s_recv (server);
cycles++;

// Simulate various problems, after a few cycles
if (cycles > 3 && within (3) == 0) {
std::cout << "I: simulating a crash" << std::endl;
break;
}
else
if (cycles > 3 && within (3) == 0) {
std::cout << "I: simulating CPU overload" << std::endl;
sleep (2);
}
std::cout << "I: normal request (" << request << ")" << std::endl;
sleep (1); // Do some heavy work
s_send (server, request);
}
return 0;
}