In the last two days, the code is very unsmooth.,I can't always write the kind I expected.,Today I wrote and deleted.,Deleted and wrote.,Repeat no less than three times.,The head is a little big.,A mess of paste.,A little cardin.,So you need to smooth out your thinking.,Changkong doesn't want to force himself to write some plots that he doesn't want to dislike.,That's a kind of torture for both you and Changkong himself!(To be continued......