Stacks, Queues, and Deques

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Presentation transcript:

Stacks, Queues, and Deques Chapter 6

Object Class Hierarchy

Stacks Array version Linked-list version applications

Stacks A last-in, first-out or LIFO data structure Basic operations: Push, Pop and Top

Basic Stack Operations

Stack Class Definition

Stack as Array

Constructor, Destructor and Purge() member functions

Push() Pop() and Top()

Accept()

Iterator

Iter class member function definition

Stack as Linked List

Constructor, Destructor and Purge() member functions

Push() Pop() and Top()

Accept()

Iterator

Application Infix Notation: binary operands appear in between their operands. (5+9)*2+6*5 Prefix Notation: (polish notation) binary operators precede their operands. No parenthesis needed. + * + 5 9 2 * 6 5 + ( * ( + ( 5 , 9 ) , 2 ) , * ( 6 , 5 ) Postfix Notation: binary operators follow their operands. No parenthesis needed. 5 9 + 2 * 6 5 * +

Evaluating Postfix Expressions

Evaluating Postfix Expression 5 9 + 2 * 6 5 * +

Implementation

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