[方法声明](%E6%96%B9%E6%B3%95%E5%A3%B0%E6%98%8E.md) [指针对象的方法](%E6%8C%87%E9%92%88%E5%AF%B9%E8%B1%A1%E7%9A%84%E6%96%B9%E6%B3%95.md) [封装](%E5%B0%81%E8%A3%85.md)