int vals[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
    vector<int> numbers(vals, vals + 10);

    vector<int>::iterator       start = numbers.begin();
    vector<int>::reverse_iterator end = numbers.rbegin();

    while (start != end.base() && start != (end + 1).base())
        swap(*(start++), *end++);

    for (int i : numbers)
        cout << i << endl;