code: error

main.cpp

@@ -55,9 +55,14 @@ int main(int argc, char* argv[])
     if (argc > 1) {
         CURL *curl = curl_easy_init();
         if(curl) {
+
             CURLcode res;
             curl_easy_setopt(curl, CURLOPT_URL, argv[0]);
             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);
         }
         return 0;}