добавлен bool prompt

main.cpp

@@ -10,25 +10,30 @@ struct Input {
     size_t bin_count;
 };
 
-Input input_data(istream& in) {
+Input input_data(istream& in, bool prompt) {
     Input inp;
     size_t number_count;
+    if (prompt){
         cerr << "Enter number count: ";
+    }
     cin >> number_count;
-
     inp.numbers.resize(number_count);
+    if (prompt){
                 cerr << "Enter numbers: ";
+        }
     for (size_t i = 0; i < number_count; i++) {
         cin >> inp.numbers[i];
     }
 
+    if (prompt) {
             cerr << "Enter bin count: ";
+    }
     cin >> inp.bin_count;
     return inp;
 }
 
 int main() {
-    auto in = input_data(cin);
+    auto in = input_data(cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
     return 0;