指向自身的指针 [英] a pointer that points to itself

问题描述

C中是否可以声明并初始化指向

本身的指针？为什么或为什么不呢？

Is it possible in C to declare and initialize a pointer that points to
itself? Why or why not?

推荐答案

dough写道：

dough wrote:

是在C中可以声明并初始化指向
本身的指针吗？为什么或为什么不呢？

Is it possible in C to declare and initialize a pointer that points to
itself? Why or why not?

当然可以，但它的用途是什么？

Sure, but of what use would it be?

在文章< 11 ********************** @ g44g2000cwa.googlegroups .com> ;,

tedu< tu @ zeitbombe。有机>写道：

In article <11**********************@g44g2000cwa.googlegroups .com>,
tedu <[e-mail]> wrote:

dough写道：

在C中是否可以声明并初始化指向
本身的指针？为什么或为什么不呢？

Is it possible in C to declare and initialize a pointer that points to
itself? Why or why not?

当然，但它有什么用途？

Sure, but of what use would it be?

我怀疑''面团''的意思是在单一声明中使用它

将回答作业问题。


我有一个编译和执行的解决方案没有问题

我抛出的任何警告级别。它确实提高了一些微妙的语言

积分。


-

好​​的，只有流行语。两个音节，上衣。 - Laurie Anderson

I suspect that ''dough'' means "in a single statement". The use of it
would be to answer homework questions.

I have a solution that compiles and executes without problem with
any warning level I throw at it. It does raise some subtle language
points.

--
Okay, buzzwords only. Two syllables, tops. -- Laurie Anderson

Walter Roberson写道：

Walter Roberson wrote:

tedu< [e-mail]>写道：

tedu <[e-mail]> wrote:

dough写道：

C是否可以声明并初始化指向自身的指针？为什么或为什么不呢？

Is it possible in C to declare and initialize a pointer that points
to itself? Why or why not?

当然，它的用途是什么？

Sure, but of what use would it be?

我怀疑''面团''的意思是在单一声明中使用它
将回答作业问题。

我有一个解决方案，编译和执行没有问题
我投掷的任何警告级别。

I suspect that ''dough'' means "in a single statement". The use of it
would be to answer homework questions.

I have a solution that compiles and executes without problem with
any warning level I throw at it.

我怀疑这样做很少，编译器编写者无法证明检测可疑代码所需的时间和代码是合理的。 />
确实提高了一些微妙的语言点。

I suspect it''s done so rarely that compiler writers can''t justify the
time and code needed to detect the questionable code.
It does raise some subtle language points.

包含1个元素的通用循环列表可能有一个指针



指向自己。如果你在谈论像......这样的表达式。


p =（（演员）p） - >下一个;


.. ..之前已在csc讨论过这个问题。


-

彼得

A generic circular list containing 1 element may well have a pointer
that
points to itself. If you''re talking about expressions like...

p = ((cast) p)->next;

....then this has been discussed before in csc.

--
Peter

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