Write this function in C++ with the given requirements:

The tree is a binary search tree!

Function: num range Description returns the number of elements in tree which are Runtime: O(h) where h is the tree height struct tree node int number0fNodesnLeftSubtree = 0; int numberofNodesInRightSubtree0 tree node left: tree_node right: int num range (int min, int max) i return numNodes: I/ where num is num of nodes between min and max