Merge branch 'double'

Мерджим ветки

main.cpp

@@ -3,7 +3,7 @@ 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'