code: добавлен вывод разности

main.cpp

@@ -3,6 +3,7 @@ int main () {
     cout << "Enter A and B: ";
     int a, b;
     cin >> a >> b;
-    cout << "A + B = " << a + b;
+    cout << "A + B = " << a + b << '\n'
+        << "A - B = " << a-b << '\n';
     return 0;
 }