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

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

I'd say it is better to never use it in C++. Ideally, you will only have to use it when dealing with C APIs or some legacy stuff, still related to or designed with C APIs in mind.

Pointer to pointer has pretty much been made obsolete by the C++ language features and the accompanying standard library. You have references for when you want to pass a pointer and edit the original pointer in a function, and for stuff like a pointer to an array of strings you are better off using a std::vector. The same applies for multidimensional arrays, matrices and whatnot, C++ has a better way of dealing with those things than cryptic pointers to pointers.