diff --git a/main.cpp b/main.cpp
index 71dbe34..f7834c8 100644
--- a/main.cpp
+++ b/main.cpp
@@ -15,32 +15,32 @@ struct Input
 };
 
 Input
-input_data()
+input_data(istream& in)
 {
 
     size_t number_count;
     cerr << "count=";
-    cin >> number_count;
+    in >> number_count;
 
-    Input in;
+    Input rez;
 
-    in.numbers.resize(number_count);
+    rez.numbers.resize(number_count);
 
     for (size_t i = 0; i < number_count; i++)
     {
-       cin >> in.numbers[i];
+       in >> rez.numbers[i];
     }
 
     cerr << "bin_count= ";
-    cin >> in.bin_count;
+    in >> rez.bin_count;
 
-    return in;
+    return rez;
 }
 
 
 int main()
 {
-    auto in = input_data();
+    auto in = input_data(cin);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
     return 0;