diff --git a/main.cpp b/main.cpp
index b91797c..5297190 100644
--- a/main.cpp
+++ b/main.cpp
@@ -9,26 +9,34 @@ struct Input {
     size_t bin_count{};
 };
 
-Input input_data() {
+Input input_data(istream& in, bool promt = false) {
+
+    //переменная-экземпляр
+    Input qin;
+
     //ввод количества чисел
     size_t number_count;
-    cerr << "Enter number count: ";
-    cin >> number_count;
-    //переменная-экземпляр
-    Input in;
+    if( promt ) {
+        cerr << "Enter number count: ";
+    }
+    in >> number_count;
+
     //ввод чисел
-    in.numbers.resize(number_count);
+    qin.numbers.resize(number_count);
     for (size_t i = 0 ; i < number_count ; i++) {
-        cin >> in.numbers[i];
+        in >> qin.numbers[i];
     }
+
     //ввод количества корзин
-    cerr << "Enter bin count: ";
-    cin >> in.bin_count;
-    return in;
+    if( promt ) {
+        cerr << "Enter bin count: ";
+    }
+    in >> qin.bin_count;
+    return qin;
 }
 
 int main() {
-    auto in = input_data();
+    auto in = input_data(cin);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
 }