Using new on void pointer

Question

int main()
{
    void* Foo = new???
    delete Foo;
}

How do you do something like the above? You can't put new void[size]. And I don't want to know how to do it with malloc() and free(). I already know that works. I'm curious and want to know how it's done with new and delete.

I googled this and saw something about operator new(size); and operator delete(size);

What is the difference between those and new / delete? Why does C++ not just allow new void* [size]?

Answer 1

This will do the trick:

int main()
{
    void* Foo = ::operator new(N);
    ::operator delete(Foo);
}

These operators allocate/deallocate raw memory measured in bytes, just like malloc.