C ++类/ struct成员的默认可见性 [英] default visibility of C++ class/struct members

问题描述

在C ++中，为什么private是类成员的默认可见性，而对于结构体是public的？

In C++, why is private the default visibility for members of classes, but public for structs?

推荐答案

作为C的超集。结构体从C继承，其成员的语义是公共的。有很多C代码存在，包括需要使用C ++的库，它们使用结构体。类是在C ++中引入的，为了符合OO封装哲学，它们的成员默认是私有的。

C++ was introduced as a superset of C. Structs were carried over from C, where the semantics of their members was that of public. A whole lot of C code exists, including libraries that were desired to work with C++ as well, that use structs. Classes were introduced in C++, and to conform with the OO philosophy of encapsulation, their members are private by default.

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