Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I think that Question about C++ navigation should be on Stack Exchange. So I tried to flag it as off-topic - the off-topic box only gave me the choice of meta for this - on other SE sites it would list other SE sites.
In this case, I think the post is OK for the site, and it's gotten some decent answers.
In the future, you can flag a post for moderator attention and a moderator can migrate it to any SE site if it needs to be moved.