关于双指针的信息 [英] Information on Double pointers
问题描述
您好我正在处理Snmp相关项目。我想深入了解指针的概念。所以,如果有人向我提供与
数据结构和指针相关的信息,我非常高兴。
谢谢和问候
agni
Zoran Cutura写道:
嗯,这个怎么样。指针是指针,因为它指向
某些东西。
空指针是一个指向任何东西的指针。
-
pete
Le 14/06/2005 12: 59,dans 42***********@mindspring.com ,? * pete *?
< pf ***** @ mindspring.com> écrit*:
Zoran Cutura写道:
嗯,这个怎么样。指针是指针,因为它指向
某些东西。
空指针是一个指向任何东西的指针。
它指向一个非常奇怪的区域,你不应该尝试阅读;-)
BTW,在PowerPC上你可以避免通常的零 ;段,我想
然后你可以像任何其他一样访问NULL指针。只是一个安全,
不是必需品,但标准不会同意我害怕。
抱歉Pete,Null指针不是指向任何东西的pinter,但它指向某个内存位置,而软件中断可以从这里生成
。
Hi i am currently working on Snmp related project. I want to know deep
concepts of "pointers" so if any one provide me information related to
datastructures and pointers i am very happy.
Thanks and regards
agni
Zoran Cutura wrote:
Well, how about this. A pointer is a pointer because it points to
something.
A null pointer is a pointer that doesn''t point to anything.
--
pete
Le 14/06/2005 12:59, dans 42***********@mindspring.com, ?*pete*?
<pf*****@mindspring.com> a écrit*:
Zoran Cutura wrote:Well, how about this. A pointer is a pointer because it points to
something.
A null pointer is a pointer that doesn''t point to anything.
It points to a very strange zone that thou shall not try to read ;-)
BTW, on a PowerPC you can avoid the usual "zero" segment, I suppose
you can then access the NULL pointer like any other. Just a security,
not a necessity, but the Standard won''t agree I fear.
Sorry Pete,Null pointer is not a pinter that points to nothing,but it
points to some memory location from where a software interrupt can be
generated.
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