I need help with writing code for the copy constructor please!

\#include "ArrayList. h " ArrayList::ArrayList(const ArrayList \& ) \{ oublic: ArrayList(); ArrayList(const ArrayList\&); // copy constructor ArrayList(); bool empty() const; int size() const; void push_back(const string\& userString); // makes a copy o void push_front(const string\& userString); bool pop_back(std::string\& str); // sets str to a copy of th bool pop_front(std::string\& str); int length\{4\}; int Amt0fstring\{0\}; string *arr = \{new string[4]\{ [0]:"",[1]:"", [2]: "", [3]: ""\}\}