i cannot figure out the reference for this and i am stuck if possible can you comment each line of code. so i can follow the logic

Write a complete C++ program with the two alternate functions specified below, each of which simply triples the variable count defined in main. Then compare and contrast the two approaches. These two functions are a) function triple ByValue that passes a copy of count by value, triples the copy and returns the new value and b) function tripieByReference that passes count by reference via a reference parameter and triples the original value of count through its alias (i.e., the reference parameter)