C ++ - struct对类 [英] C++ - struct vs. class

问题描述

可能的重复项：

C / C ++ Struct与类

什么是C ++中的POD类型？

$ b

在 C ++在实验室书中，第6章：类中，在访问说明符

在类定义中，成员和基类的默认
访问是
private。在结构体定义中，
的缺省值是public。 这是类和
结构之间唯一的
区别，尽管按照惯例，一些
程序员只为 POD
类使用struct 。

：

• 类和结构之间不存在另外的区别，因为结构体不包含函数，只保存数据？


• 什么是POD类？而且，这里的所有其他课程是什么意思？

谢谢。

解决方案

其他区别是

 模板< class T& ... 
  

，但

  template< struct T> ... 
  

不是。

Possible Duplicates:
C/C++ Struct vs Class
What are POD types in C++?

Hi,

In the C++ In a Nutshell book, in chapter 6: classes, unders Access specifiers, mentioned the following:

In a class definition, the default access for members and base classes is private. In a struct definition, the default is public. That is the only difference between a class and a struct, although by convention, some programmers use struct only for POD classes and use class for all other classes.

My questions here are:

• Isn't there another difference between classes and structs in that structs don't hold functions and just hold data?
• What are POD classes? And, what is meant by all other classes here? Are there then special classes?

Thanks.

解决方案

The other difference is that

template<class T> ...

is allowed, but

template<struct T> ...

is not.

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