Modify the buildParseTree and evaluate functions to handle boolean statements (and, or, and not). Remember that “not” is a unary operator, so this will complicate your code somewhat.
Modify the code for a binary search tree to make it threaded. Write a non-recursive inorder traversal method for the threaded binary search tree. A threaded binary tree maintains a reference from each node to its successor.
Modify our implementation of the binary search tree so that it handles duplicate keys properly. That is, if a key is already in the tree then the new payload should replace the old rather than add another node with the same key.
Create a binary heap with a limited heap size. In other words, the heap only keeps track of the n most important items. If the heap grows in size to more than n items the least important item is dropped.
Using the BinaryHeap class, implement a new class called PriorityQueue. Your PriorityQueue class should implement the constructor, plus the enqueue and dequeue methods.