class Object
{

};

auto **list = nullptr;
uint32_t size{0};
..
..
size = newSize;
list = (decltype(list))realloc(list, newSize * sizeof(Object *));
for (uint32_t i = size; i != newSize; ++i) list[i] = new Object();
size = newSize;

..
..
for (uint32_t i = 0; i != size; ++i) delete list[i];
free(list);
..