Let's complain, use introduces problems, and the teacher doesn't even talk about it.

Question

I encountered many errors and searched for them for a long time. The code was obviously the same as the teacher's, but the result was wrong. Then I found out that the problem was introduced by use. I went back to watch the teacher's video and found that he actually introduced it. I don’t even know when he introduced it, he never mentioned it at all. . . This pitfall is really too big for a novice. .

Has anyone encountered the same problem

Answer 1

Brother, that's because you're not serious enough, or it's a basic problem.