[类型别名和自定义类型](%E7%B1%BB%E5%9E%8B%E5%88%AB%E5%90%8D%E5%92%8C%E8%87%AA%E5%AE%9A%E4%B9%89%E7%B1%BB%E5%9E%8B.md) [结构体](%E7%BB%93%E6%9E%84%E4%BD%93.md)