What are convincing examples where pointer arithmetic is preferable to array subscripting?

Question

I\'m preparing some slides for an introductory C class, and I\'m trying to present good examples (and motivation) for using pointer arithmetic over array subscripting.

Answer 1

iterating through a 2-dimensional array where the position of a datum does not really matter
if you dont use pointers, you would have to keep track of two subscripts
with pointers, you could point to the top of your array, and with a single loop, zip through the whole thing