Question

class Print 
   {  
   public:
       void PrintAll() {}
   private:
    std::list<int> mylist;
   };

I see this example question from a C++ language book.
And I want to print the internal mylist elements.
How can it be done if mylist needs to be reversed, using C++ STL library and using to output the result.

Thanks you very much!

Answer 1

std::list<>::reverse()?

That said, if you only need to print the list in reverse, you can simply print it using list‘s reverse iterators (obtained by std::list<>::rbegin() and std::list<>::rend()) rather than by using list‘s normal iterators. E.g.:

// given std::list<int> l;
for (std::list<int>::const_reverse_iterator iter(l.rbegin()), iter_end(l.rend());
        iter != iter_end;
        ++iter)
{
    std::cout << *iter << '\n';
}