code: добавили параметр prompt

main.cpp

@@ -14,22 +14,28 @@ struct Input {
 };
 
 Input
-input_data(istream& in){
+input_data(istream& in, bool prompt){
 
     size_t number_count;
+    if (prompt){
         cerr << "Enter number count: ";
+    }
     in >> number_count;
 
     Input iinn;
 
     iinn.numbers.resize(number_count);
+    if (prompt){
         cerr << "Enter numbers: " << endl;
+    }
     for (size_t i=0; i < number_count; i++)
     {
         in >> iinn.numbers[i];
     }
 
+    if (prompt){
         cerr << "Enter bin count: ";
+    }
     in >> iinn.bin_count;
 
     return iinn;
@@ -38,7 +44,7 @@ input_data(istream& in){
 int main()
 {
 
-    Input iinn = input_data(cin);
+    Input iinn = input_data(cin, true);
     std::vector<size_t> bins = make_histogram(iinn.numbers, iinn.bin_count);
     show_histogram_svg(bins);
     return 0;