Jump to content
  • Advertisement
Sign in to follow this  
James Sioutis

problem declaring classes

This topic is 4830 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

If you have 2 classes such as... class ClassOne { public: ClassTwo something; }; class ClassTwo { public: ClassOne somethingElse; }; How in the hell would you be able to do this? Is there a way you can pre-define classes at the beginning of the file so they will be accessible without the compiler saying there's errors?

Share this post


Link to post
Share on other sites
Advertisement
You can't do that. That would require ClassOne to contain a ClassTwo, which contains a ClassOne, which contains a ClassTwo.... That would require each of the classes to be infinitely large.

What you can do is have ClassOne contain a pointer or reference to a ClassTwo and a ClassTwo contain a pointer or reference to ClassOne. You do this with a forward declaration. Ex:

class ClassTwo;

class ClassOne {
ClassTwo * something;
};

class ClassTwo {
ClassOne * something_else;
};


For more information see this article.

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!