diff --git a/CalculatorTutorial/CalculatorTutorial.cpp b/CalculatorTutorial/CalculatorTutorial.cpp
index 2720064..78f7d69 100644
--- a/CalculatorTutorial/CalculatorTutorial.cpp
+++ b/CalculatorTutorial/CalculatorTutorial.cpp
@@ -6,6 +6,7 @@
 
 using namespace std;
 
+// ソースコードに変更
 int main()
 {
     double x = 0.0;