In C++

I need some help building a display_all class in my .h file and its related function in my implementation file using both a binary search tree and operator overloading.

The program's data structure is a LLL but needs to incorporate a class with operator overloading and a binary search tree. Some code/pseudo code would be helpful. Thank you. Please only C++

Here is the little I have so far:

class BST { arguments }: friend operator ostream << (arg) { arg.display_all; }