Question

I have to create a function that can take in an array of pointers with a known size, and set all the pointers to NULL. The caveat is that I don’t know the type beforehand. This is what I have tried so far:

    template <typename T>
  static void Nullify(T** _Array, int _Size, unsigned int _SizeOf)
  {
   for (int i = 0; i < _Size; i++)
   {
    _Array[i * _SizeOf] = NULL;
   }
  }

Which is giving me errors (not the function itself, but I am trampling on memory I should not be trampling on resulting in a memory error later on). I am passing in the array (_Array – already initialized to _Size), its size (_Size), and the sizeof(Pointer*) as _SizeOf.

Any help would be greatly appreciated 🙂

Answer 1

You don’t need _SizeOf. This is what you want:

template <typename T>
static void Nullify(T** _Array, int _Size)
{
   for (int i = 0; i < _Size; i++)
   {
      _Array[i] = NULL;
   }
}

The compiler knows the size of a pointer, and does the math for you during the array dereference.