diff --git a/calculator.cpp b/calculator.cpp
new file mode 100644
index 0000000..23b2bb3
--- /dev/null
+++ b/calculator.cpp
@@ -0,0 +1,6 @@
+#include "calculator.h"
+
+int Calculator::Add (int a, int b)
+{
+    return a + b;
+}
diff --git a/calculator.h b/calculator.h
new file mode 100644
index 0000000..6b87fdc
--- /dev/null
+++ b/calculator.h
@@ -0,0 +1,5 @@
+class Calculator
+{
+    public:
+        int Add (int, int);
+};