Data Structures and Algorithms with Object-Oriented Design Patterns in C#

Array Implementation

A regular set may contain either zero or one instance of a particular item. As shown in the preceding section if the number of possible items is not excessive, we may use an array of bool variables to keep track of the number of instances of a particular item in a regular set. The natural extension of this idea for a multiset is to keep a separate count of the number of instances of each item in the multiset.

Program  introduces the MultisetAsArray class. The MultisetAsArray class extends the AbstractSet class defined in Program  and it implements the Multiset interface defined in Program . The multiset is implemented using an array of counters. Each counter is an int in this case.

  
Program: MultisetAsArray class.

• Basic Operations
• Union, Intersection, and Difference

Copyright © 2001 by Bruno R. Preiss, P.Eng. All rights reserved.