CPSC 421-020 Object-Oriented Programming (OOP) Spring 2025

Week 10 Class 17 Tue Mar 18 Posted: Mar 18

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

Announcements

• Catching Up Behind on responses to Project 2 issues
• Office Hours Additional Office Hours today, Tue Mar 18 from 10:30 - 11:30 am.
• Project 3

Agenda

• Exercise 52: Lambda

  Follow along in your commits as we explore what we can get from the context of the lambda definition.

  Lambda-020

• Notes: UML Class Relationships
• Exercise 53: UML Class Relationships Crossword
• Guide: Valgrind

• Exercise 54: Memory

  The file Memory.cpp in the repository Memory contains many memory resource problems described in the notes.

  Compile and run the program on your platform (i.e., your compiler and operating system). You may or may not see a memory-related issue during the build and run.

  Go to a system where you can run valgrind. Following the instructions in the Guide: Valgrind, compile and run valgrind on the program.

  Fix the memory resource problems in Memory.cpp without using std::unique_ptr. Do this for each section one by one committing each section separately. Get the code to the point where it compiles and runs successfully, and you have a clean Valgrind run.

  Once done, tag this in Git as memoryfixed.

• Exercise 55: Names

  The UML Class Diagram shows Name with attributes that are single-value optionals.

  Convert the source code class to use std::optional<std:string> instead of the pair of std::string and a boolean flag.

  The link for GitHub Classroom is in Brightspace.

  Due 4:30 pm on Friday, Mar 21

  Reminder The type String in a UML Class Diagram does not necesarily map to a std::string in a C++ program. It could map to a std::string_view, or even a c-string. Which source-code type a UML type maps to is part of the code implementation, and not part of the model*.