receive in tcp client c++

in my client side in receive function if (buffer[i] == work[i] ) write 1 in pin until (c < 13)
and when program in while,if socket receive stop to write 0 in pin,it doesn't work until while ends ,I want to socket any time receive stop it's write 0 in pin ,how can handle this?
Client:

Code:

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bool client::conn(int num_pin_1, int num_pin_2) {
        struct sockaddr_in serv_addr;
        struct hostent *server;

        sock = socket(AF_INET, SOCK_STREAM, 0);
        if (sock < 0)
                printf("ERROR opening socket");
        else {
                fflush(stdout);
        }

        server = gethostbyname("192.168.1.129");
        if (server == 0) {
                fprintf(stderr, "ERROR, no such host\n");
                exit(0);
        } else {
                printf("connected");
                fflush(stdout);
        }
        bzero((char *) &serv_addr, sizeof(serv_addr));
        serv_addr.sin_family = AF_INET;
        bcopy((char *) server->h_addr,
        (char *)&serv_addr.sin_addr.s_addr,
        server->h_length);
        serv_addr.sin_port = htons(MYPORT);
        while (connect(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
                perror("ERROR connecting");
        }

}

bool client::rec_data(int num_pin_1, int num_pin_2) {

rc=recv(sock, buffer, sizeof(buffer), 0);
        if ( rc < 0) {
                perror("receive failed");
                return false;
        }

for (int i = 0; i < 2; i++) {
    if (buffer[i] == work[i] ) {       
        while (c < 13) {       
            digitalWrite(pin2, HIGH);
            digitalWrite(pin1, LOW);
        }
  }

    if (buffer[i] == Stop[i]) {
        digitalWrite(pin2,  LOW);
        digitalWrite(pin1, LOW);
    }
}

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Code:

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      while (c < 13) {       
            digitalWrite(pin2, HIGH);
            digitalWrite(pin1, LOW);
        }

---

How does c get initialised and changed?

c is:

Quote:

---

d= clock();
c=double(clock() - d) / CLOCKS_PER_SEC;

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But in the loop, either the loop is not executed at all (c >= 13) or if c < 13 then the loop is infinite as c isn't changed in the loop :eek: