is this the right way to setsockopt()?

i'm trying to use setsockopt() to turn off Nagle's algorithm and to set the send buffer to zero... is the code i'm using

below correct? and where should i place this code - after a socket() or after the connect()?

Code:

---

    /* TCP_NODELAY to turn off Nagle's algorithm */
    if(setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, (char *) &tcpnodelay_flag, sizeof(int)) == -1)
    {
        perror("setsockopt (TCP_NODELAY)");
        exit(1);
    }
    /* set SO_SNDBUF to 0 to make send buffer 0 */
    if(setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char *) &sendbuffer_sz, sizeof(size_t)) == -1)
    {
        perror("setsockopt (SO_SNDBUF)");
        exit(1);
    }

---

thanks!