When to use Pointer-to-Pointer in C++?

Question

I was wondering when we use Pointer to Pointer in C++ and why we need to point to a pointer? I know that when we point to a pointer it means we are saving the memory address of

Answer 1

Say you wanna instantiate an object in C++...

MyClass * obj = new MyClass();

You have to do this because new returns a pointer to the allocated object in dynamic memory. The following would be wrong:

MyClass obj = new MyClass(); // wrong. 'new' returns a pointer.

Say you want an array of objects...

MyClass ** objArray = new MyClass*[10];