итоговый вариант 2

main.cpp

@@ -51,16 +51,27 @@ write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
 }
  
 Input
-download(const string& address) {
-	cerr << "zalupa ebanaya" << endl;
+download(const string& address, const string& option) {
 	stringstream buffer;
 
 	CURL* curl = curl_easy_init();
+	if ((option != "") && (address != "-verbose") && (option != "-verbose")) {
+		cout << "Invalid argument, please use -verbose" << endl;
+		exit(2);
+	}
 	if (curl) {
 		CURLcode res;
+		if (option == "" || option == "-verbose") {
 			curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+		}
+		else if (address == "-verbose") {
+			curl_easy_setopt(curl, CURLOPT_URL, option.c_str());
+		}
 		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
 		curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+		if (address == "-verbose" || option == "-verbose") {
+			curl_easy_setopt(curl, CURLOPT_VERBOSE, option == "-verbose" ? option.c_str() : address.c_str());
+		}
 		res = curl_easy_perform(curl);
 		if (res != CURLE_OK) {
 			cout << curl_easy_strerror(res);
@@ -68,19 +79,15 @@ download(const string& address) {
 		}
 		curl_easy_cleanup(curl);
 	}
-	cerr << "polnaya pizda" << endl;
-	cerr << buffer.str();
 	return input_data(buffer, false);
 }
 
 int main(int argc, char* argv[]) {
 	Input in;
 	if (argc > 1) {
-		cerr << "ebal rot"<< endl;
-		in = download(argv[1]);
+		in = download(argv[1], argv[2]);
 	}
 	else {
-		cerr << "kak je zaebalo"<<endl;
 		in = input_data(cin, true);
 	}
 	auto bins = make_histogram(in.numbers, in.bin_count);