добавлены аргументы

main.cpp

@@ -3,6 +3,7 @@
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
+#include <curl/curl.h>
 using namespace std;
 
 struct Input {
@@ -32,7 +33,12 @@ Input input_data(istream& in, bool prompt) {
     return inp;
 }
 
-int main() {
+int main(int argc, char* argv[]) {
+    curl_global_init(CURL_GLOBAL_ALL);
+    if (argc > 1){
+        cerr << "argv[0] = " << argv[0] << "argc = " << argc;
+        return 0;
+    }
     auto in = input_data(cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);