When is pointer to array useful?

Question

I can declare:

int (*ap)[N];

So ap is pointer to int array of size N. Why is this ever useful? If I pass it to function, what usefu

Answer 1

This will probably careen off into subjective/argumentative, but...

In my opinion, pointers to arrays are in the language because they fell into the language. There are pointers to every other declarable data type, so these are here too. I've never seen anyone get really useful work out of them. Hypothetically, they allow a prototype that demands an array and not a pointer to the element, but ...