Add input_data() new parameter: bool prompt

Histogram/main.cpp

@@ -7,19 +7,27 @@ struct Input{
     size_t bin_count{};
 };
 
-Input input_data(istream& in) {
+Input input_data(istream& in, bool prompt) {
     size_t number_count;
-    std::cerr << "Enter number count: ";
+    if (prompt){
+        
+        std::cerr << "Enter number count: ";
+
+    }
     in >> number_count;
 
-    std::cerr << "Enter numbers: \n";
+    if (prompt) {
+        std::cerr << "Enter numbers: \n";
+    }
     Input local;
     in.numbers.resize(number_count);
     for (size_t i = 0; i < number_count; ++i) {
         in >> local.numbers[i];
     }
+    if (prompt) {
+        std::cerr << "Enter bucket: ";
+    }
 
-    std::cerr << "Enter bucket: ";
     in >> local.bin_count;
 
     return local;
@@ -28,7 +36,7 @@ Input input_data(istream& in) {
 using namespace std;
 
 int main() {
-    Input in = input_data(cin);
+    Input in = input_data(cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
     return 0;