обработка ошибок

.gitignore

@@ -1,3 +1,4 @@
+/curl
 /bin
 /obj
 /*.layout

main.cpp

@@ -3,6 +3,7 @@
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
+#include <curl/curl.h>
 using namespace std;
 
 struct Input {
@@ -10,25 +11,44 @@ struct Input {
     size_t bin_count;
 };
 
-Input input_data(istream& in) {
+Input input_data(istream& in, bool prompt) {
     Input inp;
     size_t number_count;
-    cerr << "Enter number count: ";
+    if (prompt){
+        cerr << "Enter number count: ";
+    }
     cin >> number_count;
-
     inp.numbers.resize(number_count);
-    cerr << "Enter numbers: ";
+    if (prompt){
+                cerr << "Enter numbers: ";
+        }
     for (size_t i = 0; i < number_count; i++) {
         cin >> inp.numbers[i];
     }
 
-    cerr << "Enter bin count: ";
+    if (prompt) {
+            cerr << "Enter bin count: ";
+    }
     cin >> inp.bin_count;
     return inp;
 }
 
-int main() {
-    auto in = input_data(cin);
+int main(int argc, char* argv[]) {
+    curl_global_init(CURL_GLOBAL_ALL);
+    if (argc > 1) {
+        CURL* curl = curl_easy_init();
+          if(curl) {
+            CURLcode res;
+            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
+            res = curl_easy_perform(curl);
+        if (res != CURLE_OK){
+                cerr << curl_easy_strerror(res);
+                exit(1);
+            }
+            curl_easy_cleanup(curl);
+        }
+    }
+    auto in = input_data(cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
     return 0;