Question

If I have:

std::size_t bagCapacity_ = 10;
std::size_t bagSize = 0;
A** bag = new A*[bagCapacity_];

while (capacity--)
{
  bag[capacity] = new A(bagSize++); //**here I'm loading this array from the end is it ok?**
}

And also can I delete those object from starting at the end of the array?

while (capacity--)
{
  delete bag[capacity];
}

Question in a code.

Answer 1

here I'm loading this array from the end is it ok?

Yes, that is fine. You can fill the elements anyway you like.

delete[] bag[capacity];

This code is wrong. bag[capacity] is of type A* which is allocated using new and not new[] hence you should not do delete[] you should do only delete bag[capacity]; to delete individual A objects. At the end you should be delete[] bag to delete the memory allocated for the bag.