main: добавлен параметр prompt

main.cpp

@@ -16,7 +16,7 @@ using namespace std;
 //  Ââîä îöåíêîê ñ êëàâèàòóðû.
 
 Input
-input_data(istream& in)
+input_data(istream& in, bool prompt)
 {
     Input local;
     size_t number_count;
@@ -26,14 +26,15 @@ input_data(istream& in)
     local.numbers.resize(number_count);
     for (size_t i = 0; i < number_count; i++)
         in >> local.numbers[i];
-    cerr << "Enter bin count: ";
+    if (prompt)
+        cerr << "Enter bin count: ";
     in >> local.bin_count;
     return local;
 }
 
 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;