FAQ: Classes and Objects - Destructors

This community-built FAQ covers the “Destructors” exercise from the lesson “Classes and Objects”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Learn C++

FAQs on the exercise Destructors

There are currently no frequently asked questions associated with this exercise – that’s where you come in! You can contribute to this section by offering your own questions, answers, or clarifications on this exercise. Ask or answer a question by clicking reply (reply) below.

If you’ve had an “aha” moment about the concepts, formatting, syntax, or anything else with this exercise, consider sharing those insights! Teaching others and answering their questions is one of the best ways to learn and stay sharp.

Join the Discussion. Help a fellow learner on their journey.

Ask or answer a question about this exercise by clicking reply (reply) below!
You can also find further discussion and get answers to your questions over in #get-help.

Agree with a comment or answer? Like (like) to up-vote the contribution!

Need broader help or resources? Head to #get-help and #community:tips-and-resources. If you are wanting feedback or inspiration for a project, check out #project.

Looking for motivation to keep learning? Join our wider discussions in #community

Learn more about how to use this guide.

Found a bug? Report it online, or post in #community:Codecademy-Bug-Reporting

Have a question about your account or billing? Reach out to our customer support team!

None of the above? Find out where to ask other questions here!

Why don’t we add a parameter to the destuctor in song.cpp and song.hpp ? like:
“~Song(std::string title);”
Thanks

The parameter would be meaningless in context. Parameters are used to input information into a system. A destructor is used to empty out information from a system by removing objects that are not in use. Any parameters your include in a destructor would necessarily be removed from memory when the destructor executed, invalidating their entry.

1 Like

Usually what kind of code is written in a destructor? Printing “goodbye” like this exercise does not seem to be a normal use of destructors. Is memory allocation (I read the article at the end of this course) related? If one does not allocate memory manually, is it necessary to write something in a destructor?

Hey!

In the explanation of the lesson the scenarios when the destructor is called automatically are listed:

  • The object moves out of scope.
  • The object is explicitly deleted.
  • When the program ends

From what I understand thus far, scope is a relative matter. Could someone explain what is meant by “out of scope” in this case?

My guess is that the scope implied here is the scope of main(). Unless I’ve misunderstood the definition of scope.