Programming and Problem Solving With C++
6th Edition
ISBN: 9781449694265
Author: Nell Dale
Publisher: Jones & Bartlett Learning
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Chapter 4, Problem 3EPE
Program Plan Intro
To determine the content of the variables a, b, c, d, e, f after the execution of the given statement.
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You are given a class that processes purchases for an online store. The class receives calls to:
•
Retrieve the prices for items from a database
• Record the sold items
•
Update the database
•
Refresh the webpage
a. What architectural pattern is suitable for this scenario? Illustrate your answer by drawing a
model for the solution, showing the method calls/events.
b. Comment on how applying this pattern will impact the modifiability of the system.
c. Draw a sequence diagram for the update operation.
Chapter 4 Solutions
Programming and Problem Solving With C++
Ch. 4 - Prob. 1PSCSCh. 4 - Prob. 1EPECh. 4 - Prob. 2EPECh. 4 - Prob. 3EPECh. 4 - Prob. 4EPECh. 4 - Prob. 5EPECh. 4 - Prob. 6EPECh. 4 - Prob. 7EPECh. 4 - Prob. 8EPECh. 4 - Prob. 9EPE
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