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

Posting b/c I found this useful for debugging. Pop from original into a temp and then pop from temp back into original:

template 
void dump_stack(std::stack& stack) {
  std::stack temp;
  while (!stack.empty()) {
    T top = stack.top(); stack.pop();
    std::cout << top << " ";
    temp.push(top);
  }
  while (!temp.empty()) {
    T top = temp.top(); temp.pop();
    stack.push(top);
  }
}