ypclnt_connect
if (ypclnt_connect(ypclnt) == -1) {
} else if (ypclnt_connect(ypclnt) == -1 ||
int ypclnt_connect(ypclnt_t *);
ypclnt_connect(ypclnt) != -1 &&
if (ypclnt_connect(ypclnt) == -1 ||