Introduction to Java Programming and Data Structures  Comprehensive Version (11th Edition)
Introduction to Java Programming and Data Structures Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134700144
Author: Liang
Publisher: PEARSON
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Chapter 20.11, Problem 20.11.2CP
Program Plan Intro

In the EvaluateExpression program, the problem can be solved with help of two stacks such as operandStack and operatorStack.

Algorithm contains two phases. They are,

Phase 1:

Initially, the program starts the scanning the given expression from left to right to extract the operands, operators, and parentheses.

  • If the extracted element is operands, then push those operands into operandStack stack.
  • If the extracted element is operator such as “+” or “-”.
    • Process each and every operator at top of stack and then push it into operatorStack stack.
  • If the extracted element is operator such as “*” or “/”.
    • Process “*” or “/” operator at top of stack and then push it into operatorStack stack.
  • If the extracted element is symbol such as “(”.
    • Process “(” symbol at top of stack and then push it into operatorStack stack.
  • If the extracted element is symbol such as “)”.
    • Process “)” symbol at top of stack and then push it into operatorStack stack. Repeatedly process the operators until “(” symbol.

Phase 2:

  • Clear the stack from the top of operatorStack until empty the operatorStack.

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Chapter 20 Solutions

Introduction to Java Programming and Data Structures Comprehensive Version (11th Edition)

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