什么是const对象和const函数 [英] What is const object and const function

问题描述

什么是const对象和const函数.

What is const object and const functions.

推荐答案

当我将您的问题提交给Google时的第一个结果:

http://www.learncpp.com/cpp-tutorial/810 -const-class-objects-and-member-functions/ [

1st result when I put your question into google:

http://www.learncpp.com/cpp-tutorial/810-const-class-objects-and-member-functions/[^]

我会说:它们是常量实体".
我会添加:请检查文档 [

I would say: "they are constant entities".
I would add: "please, check out the documentation[^]".

const函数:属于类的成员函数，

例如:

const function: belong a class''s member function,

for example:

class CWnd
{
public:
    void ConstFunction() const
    {
        // It's a const function, you can change the member of this pointer.
    }

    void UnConstFunction()
    {
    }
}

// It's a const object, you can't change the member of wnd, you can't call the un-const function of 
// CWnd, such as UnConstFunction.
const CWnd wnd;

添加了代码块[/编辑]

Code block added[/Edit]

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