Merge branch 'double'

main.cpp

@@ -5,7 +5,7 @@ using namespace std;
 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'