I Tried Wording My Question To Seek Help I M Only Trying To Learn And Understand

I tried wording my question to seek help I’m only trying to learn and understand C++ better. I’m interested in understanding how a C++ sorting numbers driver program have three class member functions [void insert(double x)]; [bool search(double x)]; [void inorder(vector <double> & v)]. The search function will call a private recursive member function [bool search(double x, BtreeNode *t)]. The inorder function is empty vector v: then fills v with inorder list of numbers stored in binary search tree