This extra-credit project is worth 10 points. The grading will be rather strict in that little (if any) partial credit will be given for a program that fails to generate the correct results.
Implement a binary tree class. I've done much of the work for you in the file ExtraCredit.cpp. I've fully implemented all of the public functions in the binary tree class and I've written a main driver to test your class implementation. All you have to do is add your name as coauthor and implement the three private class functions. You are not to alter the main function in any way.
Submit your ExtraCredit.cpp file as an attachment to an email message.