code: обработка ошибок

main.cpp

@@ -7,7 +7,6 @@
 
 using namespace std;
 
-
 struct Input {
     vector<double> vec;
     size_t korz{};
@@ -43,20 +42,27 @@ int main(int argc, char* argv[]) {
     curl_global_init(CURL_GLOBAL_ALL);
 
     if (argc > 1) {
-
         const char *url = argv[1];
 
         CURL *curl = curl_easy_init();
         if (curl) {
             curl_easy_setopt(curl, CURLOPT_URL, url);
-            curl_easy_perform(curl);
+
+            CURLcode res = curl_easy_perform(curl);
+            if (res != CURLE_OK) {
+                cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << endl;
+                exit(1);
+            }
+
             curl_easy_cleanup(curl);
         }
 
         return 0;
     }
+
     auto in_with_prompt = input_data(cin, true);
     auto bins_with_prompt = make_histogram(in_with_prompt.korz, in_with_prompt.vec);
     show_histogram_svg(bins_with_prompt);
 
     return 0;
+}