code: изменение main

main.cpp

@@ -2,7 +2,7 @@
 #include <iostream>
 #include "histogram.h"
 #include "text.h"
-#include "svg.h"  
+#include "svg.h"
 using namespace std;
 
 struct Input {
@@ -10,29 +10,36 @@ struct Input {
     size_t bin_count{};
 };
 
-Input input_data() {
+Input input_data(istream& in_stream, bool prompt) {
     Input in;
     size_t number_count;
     
-    cerr << "Enter number count: ";
-    cin >> number_count;
+    if (prompt) {
+        cerr << "Enter number count: ";
+    }
+    in_stream >> number_count;
     
     in.numbers.resize(number_count);
-    cerr << "Enter numbers: ";
+    if (prompt && number_count > 0) {
+        cerr << "Enter numbers: ";
+    }
     for (size_t i = 0; i < number_count; i++) {
-        cin >> in.numbers[i];
+        in_stream >> in.numbers[i];
     }
     
-    cerr << "Enter bin count: ";
-    cin >> in.bin_count;
+    if (prompt) {
+        cerr << "Enter bin count: ";
+    }
+    in_stream >> in.bin_count;
     
     return in;
 }
 
 int main() {
-    auto in = input_data();
+    auto in = input_data(cin, true);  // true - выводить подсказки
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
     
     return 0;
 }
+}