Context new zmqcontext not connect

A ZMQ (ZeroMQ) question!

When you create a new ZMQ context using zmq_ctx_new(), you don't automatically connect to a socket. Instead, you need to create a socket using zmq_socket() and then bind or connect it to a specific endpoint.

Here's an example:

#include <zmq.h>

int main() {
    // Create a new ZMQ context
    zmq_ctx_t *context = zmq_ctx_new();

    // Create a new socket
    zmq_socket_t *socket = zmq_socket(context, ZMQ_REQ);

    // Set the socket options (e.g., linger, retries, etc.)
    zmq_setsockopt(socket, ZMQ_LINGER, &linger, sizeof(linger));

    // Bind the socket to a specific endpoint (e.g., a TCP port)
    zmq_bind(socket, "tcp://*:5555");

    // Now you can use the socket to send and receive messages
    //...

    // Clean up
    zmq_close(socket);
    zmq_ctx_term(context);
    return 0;
}

In this example, we create a new ZMQ context using zmq_ctx_new(), then create a new socket using zmq_socket() with the ZMQ_REQ socket type (which is a request-reply socket). We set some socket options using zmq_setsockopt(), and then bind the socket to a specific endpoint using zmq_bind().

Note that zmq_bind() binds the socket to a specific endpoint, whereas zmq_connect() connects the socket to a specific endpoint. If you want to connect to a specific endpoint, you would use zmq_connect() instead of zmq_bind().