Socket API :Socket operation on non-socket

Hello I have a problem when I am writing the server using the socket api. I always get this error: "Socket operation on non-socket"

struct sockaddr_in addr;
int port = 10000;
int sd;

memset((char *) &addr,0, sizeof(addr));
addr.sin_family = PF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htonl((u_short)port);

if ((sd = socket(PF_INET, SOCK_STREAM, 0) < 0)) {

    printf("socket failed");
}

if(bind(sd, (struct sockaddr *)&addr, sizeof(addr)) != 0)
{
    printf(strerror(errno));
}

close(sd);


return 0;}