你想要的是有点混乱，方法：

What you want is a little confusing, but there is a number of ways:

• 从两个抽象类派生作者




• 从写入器中删除读取功能，并创建第三个类，它可以读取和写。

就我个人而言，我会遵循最后一种方式，那么你将有一套完整的类来进行只读，和做这两个。

Personally, I would follow the last way, then you will have a full set of classes for reading-only, writing-only, and for doing both.