code: errors of easy init

main.cpp

@@ -44,13 +44,17 @@ int main(int argc, char* argv[])
 
         if(curl) {
             CURLcode res;
-            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
+            curl_easy_setopt(curl, CURLOPT_URL, argv[0]);
             res = curl_easy_perform(curl);
+            if (res!=CURLE_OK){
+                cerr << curl_easy_strerror(res);
+                exit(1);
+            }
             curl_easy_cleanup(curl);
         }
         return 0;
     }
-    Input in = input_data(cin, false);
+    Input in = input_data(cin, true);
     vector<size_t> bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);