Types of pointers

Answer 1

https://www.google.com/amp/s/tekslate.com/explain-different-types-pointers-c-language/amp/

Answer 2

Post C++11, there are 4 types of pointers in C++:
unique_ptr, shared_ptr, weak_ptr (smart pointers or wrappers over raw pointers for maintaining resource ownership in different scopes and among different owners), and the raw pointer from C.
You can find more information about them here: https://en.cppreference.com/w/cpp/header/memory

Answer 3

https://www.sololearn.com/learn/CPlusPlus/1630/