CPSC 421-010 Object-Oriented Programming (OOP) Spring 2025

Week 10 Class 18 Thu Mar 20 Posted: Mar 20

After Class

• Midterm Exam The Midterm Exam scores and feedback are in Brightspace
• Availability During Spring Break I am only available over Spring Break for questions on Project 3. Feel free to send questions about Project 3.

• Project 2

  I found two issues that I created were incorrect. They both involved a blank line after the filename in a header comment.

  I added the label false positive to the issue in GitHub. I considered deleting the issue, but that would lose the history, including your comments.

  For the score, if you did v2c, I added a point to your v2c score and your overall score. Each issue was worth 0.5 points.

Announcements

• Exercise 49: Convert II This exercise is extra credit. I will drop another lowest-exercise score.

• Exercise 54: Memory Due Date extended.

  I gave a score and any feedback to those who successfully completed the exercise so they can then work on Memory II.

  If you did not get a score, then one of the following applies:

  • No repository created
  • No commits
  • No proper tag exists in your repository at GitHub
  • Warnings from the compiler still exist
  • valgrind does not show a clean run with no memory leaks
  • Added calls to consumer()

  Whatever the reason above, I will allow you to fix it.

• Producer/Consumer

  Some of you treated the function consumer() as a function for deleting memory. That is not the entire purpose of consumer(). This is indicated by the:

  which is the universal (code example) symbol for "Other processing will occur, but we are ignoring for now to make a point". Some example of what could occur in producer/consumer, in addition to memory allocation/deallocation:

  Scenario	Producer Action	Consumer Action
  Image Processing	Load an image from disk	Process the image (apply filters, resize, save output)
  Logging	Create a log entry with explanation, severity, and timestamp	Write the log entry to a file
  Database Connection	Initialize a database connection	Use the connection to execute a query or transaction
  Asynchronous Task Processing	Produce work items (e.g., tasks)	Retrieve a task from a shared queue and process

Agenda

• Guide: Default lambda Capture
• Notes: Coupling

• Exercise 57: Coupling Crossword

• Exercise 58: Memory II

  Note that Exercise 54: Memory is a prerequisite.

  Replace the raw pointers (e.g., int* p) with std::unique_ptr<int>. Ensure it runs successfully and you have a clean Valgrind run. The include file for std::unique_ptr is <memory>. Once done, tag this in Git as smartpointer

• Notes: UML Association
• Exercise 59: UML Association Crossword Due after next class meeting

Unless otherwise noted, exercises are due by 4:30 pm on Mon Mar 31