Verified answer

Well, think about it. Why would you pass a pointer? You would pass a pointer if you needed to directly modify the contents at that address. So if you are passing a pointer to a pointer, it's because you want to modify a pointer to point to something else. i.e.

void PointElsewhere(int ** ipp)

{

int * ip = new int;

*ipp = ip;

}

int main()

{

int x;

int * xp = &x;

// xp holds the address of x

void PointElsewhere(&xp);

// now xp holds the address of the int created in that function

return 0;

}

This wasn't a particularly useful example. But it's useful if you are dealing with an array of pointers, or an array of arrays.