prog.c: In function 'get_value_from_response':
prog.c:9:16: warning: implicit declaration of function 'strdup' [-Wimplicit-function-declaration]
char *resp = strdup(response);
^
prog.c:9:16: warning: initialization makes pointer from integer without a cast [-Wint-conversion]
prog.c:11:16: warning: implicit declaration of function 'strtok_r' [-Wimplicit-function-declaration]
char *line = strtok_r(resp, kPairDelimiter, &saveptr);
^
prog.c:11:16: warning: initialization makes pointer from integer without a cast [-Wint-conversion]
prog.c:19:21: error: 'nullptr' undeclared (first use in this function)
line = strtok_r(nullptr, kPairDelimiter, &saveptr);
^
prog.c:19:21: note: each undeclared identifier is reported only once for each function it appears in
prog.c: In function 'main':
prog.c:31:6: warning: unused variable 'x' [-Wunused-variable]
int x = get_value_from_response(bssid, bssid_len, resp, kKeyBSSID);
^