Starting Out with C++: Early Objects (9th Edition)
Starting Out with C++: Early Objects (9th Edition)
9th Edition
ISBN: 9780134400242
Author: Tony Gaddis, Judy Walters, Godfrey Muganda
Publisher: PEARSON
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Chapter 18, Problem 7PC
Program Plan Intro

Queue Exceptions

Program Plan:

“main.cpp”:

  • This program features queues that can throw exceptions and print an appropriate error message and should terminate the program.
  • Include the required header files.
  • Prompt the user to enqueue 5 items.
  • Use of try – catch exceptional handling that returns error message and terminates the program if the queue overflows.
  • Prompt the user and allow user option to overflow the queue and dequeue the queue and print the values present in the queue.

“IntQueue.h”:

  • Include all the required header files.
  • Declare all the variables present in the queue along with their data types.
  • Declare all the function definition.
  • Declare the class underflow and overflow to check for exceptional handling in queue.

“IntQueue.cpp”:

  • Include all the required header files.
  • Call a constructor to create a queue and initialize its elements.
  • Initialize front and rear each to -1 and the number of elements initially present to 0.
  • A destructor is called to delete the queue array.
  • Define a queue function enqueue that inserts the value in variable num at the rear of the queue.
  • Define a queue function dequeue that deletes the value at the front of the queue, and copies it into variable.
  • Define a queue function isEmpty returns true if the queue is empty, and false if elements are present in the queue.
  • Define a Queue function is Full return true if queue is full and false if queue is not full.

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