how to print out all elements in a std::stack or std::queue conveniently

Question

If I do not to want to create a new container in order to do so?

Answer 1

1. If you need to do this, then stack or queue is not the correct choice of container.
2. If you still insist on doing this, the best way is to make a copy and pop elements off of it and print them. I'm not going to suggest another way because there's no point.