I took a look at the first question (struct/class) and see that a fair of the content is ok. The hugely upvoted accepted answer's link still functions, and it's not really a concept that goes out of date. I think the comments on the accepted answer, are relevant to the answer.
There is a problem with a few of the answers in that they are treating it like a forum, so they're just points being made, that would better be comments. Most of the answers are ok for such a beginner question.