Data Structures and Algorithms
with Object-Oriented Design Patterns in C++ 
Two constructors are declared in Program 
The first takes a single unsigned int argument M
and creates an empty B-tree of order M.
The second constructor takes two arguments,
an unsigned int and a pointer to an BTree.
The integer argument specifies the order, M, of the tree to be constructed.
The second argument specifies the parent of the node.
Copyright © 1997 by Bruno R. Preiss, P.Eng. All rights reserved.