curl:mistakes

vector.cpp

@@ -66,6 +66,11 @@ int main(int argc, char* argv[])
             CURLcode res;
             curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
             res = curl_easy_perform(curl);
+            if (res != CURLE_OK) {
+                fprintf(stderr, "curl_easy_perform() failed: %s\n",
+                    curl_easy_strerror(res));
+                exit(1);
+            }
             curl_easy_cleanup(curl);
         }
     }