code: добавлен bool prompt

main.cpp

@@ -7,22 +7,24 @@ struct Input {
     size_t korz{};
 };
 
-Input input_data(istream& in) {
+Input input_data(istream& in, bool prompt = false) {
     Input lin;
     size_t n, korz;
-
+    if(prompt)
         cerr << "Number of elements: ";
     in >> n;
     lin.vec.resize(n);
     for (size_t i = 0; i < n; i++)
         in >> lin.vec[i];
+    if(prompt)
         cerr << "Enter bin count: ";
     in >> lin.korz;
     return lin;
 }
 
 int main() {
-    auto in = input_data(cin);
+
+    auto in = input_data(cin, true);
     auto bins = make_histogram(in.korz, in.vec);
     show_histogram_svg(bins);
 }