code: переделана функция input_data() и ее вызов

main.cpp

@@ -12,12 +12,12 @@ struct Input
 };
 
 Input
-input_data()
+input_data(istream& inn)
 {
     Input in;
     size_t number_count;
     cerr << "Enter number count: ";
-    cin >> number_count;
+    inn >> number_count;
 
     in.numbers.resize(number_count);
     vector<double> numbers(number_count);
@@ -35,13 +35,14 @@ input_data()
 
 int main()
 {
-    Input in = input_data();
+    auto in = input_data(cin);
+
     auto bins = make_histogram(in.numbers, in.bin_count);
 
     double min, max;
     double bin_size = (max - min) / in.bin_count;
-    // show_histogram_text(bins, in.bin_count, bin_size);
-    show_histogram_svg(bins);
+    show_histogram_text(bins, in.bin_count, bin_size);
+    //show_histogram_svg(bins);
     //# Ïåðåìåííûå + íà÷àëî ïðîãðàììû(ââîäû)
 
 }