Encapsulate all your menu prints into a menu() function, which you can call up again after typing errors and processing selected items.
0 Answer
Encapsulate all your menu prints into a menu() function, which you can call up again after typing errors and processing selected items.
Answer: Your menu loop is not written well, you put your code menu section, this is not difficult to modify, you see your menu section logic is like
这家伙很懒，什么都没留下...