How do I sort and stable_sort elements with std::stack?

In C++, a `std::stack` does not provide direct support for sorting or stable sorting its elements since it is a LIFO (Last In, First Out) data structure. However, you can achieve sorting by transferring the elements to another container, such as `std::vector`, sorting that container, and pushing the sorted elements back to the stack. Below is an example demonstrating how to sort a stack using `std::vector` and `std::sort`.

To ensure a stable sort, you can utilize `std::stable_sort` on the vector instead.