The file ab_test.cc contains a program that allows the user
to test adding ints to an a-b tree.  For this assignment, write the
ABTree class.  The class should be a template class that implements
an a-b tree (using either an array or link based implementation).
The class should define four functions:
a.Add function, that adds the specified object to the a-b tree.Contains function, that returns true if the specified object is in
the tree.A function that overloads the << operator and prints an a-b tree
to the specified ostream.  When printing the tree use the following
recursive structure:
()                                       if node is null
([nodeData] leftChild rightChild)        if node is not null
Be sure to test your code on multiple examples and on the cs server.
Tar your code in a file that contains your name and submit it on course Inquire site.