Merge branch 'double'

project.cpp

@@ -3,7 +3,7 @@
 int main()
 {
 	cout << "Enter A and B: ";
-	int a, b;
+	double a, b;
 	cin >> a >> b;
 	cout << "A + B = " << a + b << '\n'
 		 << "A - B = " << a - b << '\n'