diff --git a/CommonVar.cpp b/CommonVar.cpp
index 2e44fe9..df8b469 100644
--- a/CommonVar.cpp
+++ b/CommonVar.cpp
@@ -13,16 +13,16 @@ struct Input {
 };
 
 Input
-InputData() {
+InputData(istream& stream) {
 	Input in;
 	size_t NumberCount;
 	cerr << "Enter number count: ";
-	cin >> NumberCount;
+	stream >> NumberCount;
 	cerr << "Enter bin count: ";
-	cin >> in.BinCount;
+	stream >> in.BinCount;
 	in.Numbers.resize(NumberCount);
 	for (int i = 0; i < NumberCount; i++) {
-		cin >> in.Numbers[i];
+		stream >> in.Numbers[i];
 	}
 	return in;
 }
@@ -35,7 +35,7 @@ void ShowHistogrammText(vector<size_t> Bins);
 
 int main() {
 	double MaxCount = 0;
-	Input in = InputData();
+	Input in = InputData(cin);
 	vector <size_t> Bins(in.BinCount);
 	Bins = MakeHistogram(in.Numbers, in.BinCount, MaxCount);
 	ShowHistogramSvg(Bins);