指向成员成员的指针

本文介绍了指向成员成员的指针的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

说我有两节课： A级 { 公开： int x; }; class B { public： A a; }; 然后我如何构建一个指向B :: ax的成员指针？什么是语法 呢？ 谢谢！

Say I have two classes: class A { public: int x; }; class B { public: A a; }; Then how do I construct a member pointer to B::a.x ? What''s the syntax for it? Thanks!

推荐答案

hu ***** @ gmail 写道： Say我有两节课： A级 { public： int x; }; B级 { 公开： A; }; 然后如何构造一个指向B :: ax的成员指针？什么是语法 呢？ Say I have two classes: class A { public: int x; }; class B { public: A a; }; Then how do I construct a member pointer to B::a.x ? What''s the syntax for it?

为什么你认为你需要它？这有用吗： B b; int * ptr =& bax; V - 请在通过电子邮件回复时删除资金''A' 我不回复热门回复，请不要问

Why do you think you need it? Does this help: B b; int *ptr = &b.a.x; V -- Please remove capital ''A''s when replying by e-mail I do not respond to top-posted replies, please don''t ask

hu ***** @ gmail 写道： 说我有两节课： A级 { 公开： int x; }; B级 { public： A a; }; 那怎么办我构造了一个指向B :: ax的成员指针？什么是语法 呢？ 谢谢！ Say I have two classes: class A { public: int x; }; class B { public: A a; }; Then how do I construct a member pointer to B::a.x ? What''s the syntax for it? Thanks!

不确定您需要什么，但下面的代码示例可能有所帮助 int A :: * ptr = A :: x; 例子; 示例。* ptr = 15; JB

Not sure what you require, but the code sample below may be of help int A::*ptr = A::x; A Example; Example.*ptr = 15; JB

n2xssvv.g02gfr12930写道： n2xssvv.g02gfr12930 wrote: hu **** *@gmail 写道： >说我有两个班级： A班级 { 公开： int x; }; B班 {公开： A a; }; 然后如何构造一个指向B :: ax的成员指针？它的语法是什么？谢谢！ >Say I have two classes:class A{public: int x;};class B{public: A a;};Then how do I construct a member pointer to B::a.x ? What''s the syntaxfor it?Thanks!

不确定您需要什么，但下面的代码示例可能有所帮助 int A :: * ptr =斧头;

Not sure what you require, but the code sample below may be of help int A::*ptr = A::x;

int A :: * ptr =& A :: x; （没有&符号''不合法的。

int A::*ptr = &A::x; (without the ampersand it''s not legal).

一个例子; 例子。* ptr = 15; A Example; Example.*ptr = 15;

现在为B做这个...... :-) V - 请在通过电子邮件回复时删除资金''A' 我没有回复最热门的回复，请不要''请问

Now do that for a ''B''... :-) V -- Please remove capital ''A''s when replying by e-mail I do not respond to top-posted replies, please don''t ask