Week 10 slog

At the beginning of last week, I spent a lot of time to review my second term test.  I missed the first one because of sick. I was worried about recursion function. Sometime, I can write true function, it work, but I don't know why it worked.Right now ,We have done second term test last test. It's include Recursion,Tree, Binary Tree, and link list. Hopefully, I will get good mark on that test. Good luck for me.