code: добавлен мой вариант

main.cpp

@@ -43,19 +43,20 @@ Input input_data(istream& stream, bool prompt)
 
 }
 
-size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
+size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx)
+{
     size_t data_size = item_size * item_count;
-    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
+    stringstream* buffer = reinterpret_cast<stringstream*>(ctx); //ñìåíà òèïà
     auto text = reinterpret_cast<const char*>(items);
     buffer->write(text, data_size);
     return data_size;
 }
 
-Input download(const string& address) {
+Input download(const string& address, bool verbose) {
     stringstream buffer;
 
     curl_global_init(CURL_GLOBAL_ALL);
-    CURL * curl = curl_easy_init();
+    CURL* curl = curl_easy_init();
 
     if(curl)
     {
@@ -63,8 +64,12 @@ Input download(const string& address) {
         curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
-        res = curl_easy_perform(curl);
 
+        if (verbose){
+            curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+        }
+
+        res = curl_easy_perform(curl);
         if(res != CURLE_OK){
             curl_easy_strerror(res);
             exit(1);
@@ -77,17 +82,31 @@ Input download(const string& address) {
 
 int main(int argc, char* argv[])
 {
+    bool verbose = false;
+    string url;
+
+    for (int i = 1; i < argc; ++i) {
+        string arg = argv[i];
+        if (arg == "-verbose") {
+            verbose = true;
+        } else if (arg.find("http://") == 0 || arg.find("https://") == 0) {
+            url = arg;
+        } else {
+            cerr << "Invalid argument: " << arg << endl;
+            cerr << "Usage: " << argv[0] << " [-verbose] [URL]" << endl;
+            return 1;
+        }
+    }
+
     Input input;
-    if (argc > 1) {
-        input = download(argv[1]);
+
+    if (!url.empty()) {
+        input = download(url, verbose);
     } else {
         input = input_data(cin, true);
     }
 
-    bool prompt = true;
-    auto in = input_data(cin, prompt);
-
-    auto bins = make_histogram(in.numbers, in.bin_count);
+    auto bins = make_histogram(input.numbers, input.bin_count);
     // show_histogram_svg_vertical(bins);
     show_histogram_svg(bins);