1. sizeof
https://www.cnblogs.com/bigbigtree/p/3580585.html
https://www.cnblogs.com/huolong-blog/p/7587711.html
2. static關鍵字
https://www.cnblogs.com/songdanzju/p/7422380.html
3. const關鍵字
https://www.cnblogs.com/xudong-bupt/p/3509567.html
4. 變量初始化順序
https://www.cnblogs.com/lidabo/p/3628987.html
5. new和delete和動態數組
https://www.cnblogs.com/wft1990/p/5962898.html
6. AVL樹
https://www.cnblogs.com/zhuwbox/p/3636783.html