zoukankan      html  css  js  c++  java
  • What are the differences between struct and class in C++?

    Question:

    This question was already asked in the context of C#/.Net.

    Now I'd like to learn the differences between a struct and a class in C++. Please discuss the technical differences as well as reasons for choosing one or the other in OO design.

    I'll start with an obvious difference:

    • If you don't specify public: or private:, members of a struct are public by default; members of a class are private by default.

    I'm sure there are other differences to be found in the obscure corners of the C++ specification.


    Answer:

    You forget the tricky 2nd difference between classes and structs.

    Quoth the standard (11.2.2):

    In absence of an access-specifier for a base class, public is assumed when the derived class is declared struct and private is assumed when the class is declared class.

    And just for completeness' sake, the more widely known difference between class and struct is defined in (11.2):

    Member of a class defined with the keyword class are private by default. Members of a class defined with the keywords struct or union are public by default.


  • 相关阅读:
    转码解码问题
    时间问题
    弹框
    获取地址栏参数
    vue返回上一页面如果没有上一页面返回首页
    html知识点
    传统的事件类型
    vue的指令
    事件取消
    事件处理程序
  • 原文地址:https://www.cnblogs.com/vigorz/p/10499208.html
Copyright © 2011-2022 走看看