In the hospital, there are too many things, there is no time to code, and tomorrow I will go home and stay up all night to catch up with the manuscript (this book has not dared to pursue grades, because what was written in a hurry, if you upload it directly, I am really sorry for the people who read the book, and myself. Therefore, in the future, the principle is: it is better to have a shortage than to have an abundance. Suggested readers: save up more and read it slowly!Another: There is a complete outline, so it's no problem to finish the book!And because you signed a contract, you must finish it, this is someone's warning!)