ina260-zmq-publisher/src/client/main.c

//  Weather update client
//  Connects SUB socket to tcp://localhost:5556
//  Collects weather updates and finds avg temp in zipcode
#include <zmq.h>
#include <assert.h>
#include <time.h>
#include <string.h>

int main (int argc, char *argv [])
{
    //  Socket to talk to server
    printf ("Collecting updates from weather server...\n");
    void *context = zmq_ctx_new ();
    void *subscriber = zmq_socket (context, ZMQ_SUB);
    int rc = zmq_connect (subscriber, "tcp://localhost:5556");
    assert (rc == 0);

    //  Subscribe to zipcode, default is NYC, 10001
 //  Subscribe to zipcode, default is NYC, 10001
    const char *filter = "Hello";
    rc = zmq_setsockopt (subscriber, ZMQ_SUBSCRIBE,
                         filter, strlen(filter));
    assert (rc == 0);

    //  Process 100 updates
    int update_nbr;
    char buffer[10];
    for (update_nbr = 0; update_nbr < 100; update_nbr++) {
      zmq_recv (subscriber, buffer, 10, 0);
      printf("Received!");
    }

    zmq_close (subscriber);
    zmq_ctx_destroy (context);
    return 0;
}