说明：  本文从英文C–FAQ (2004 年7 月3 日修订版) 翻译而来。本文的中文版权为 朱群英和孙云所有。本文的内容可以自由用于个人目的，但是不可以未经许可出 版发行。英文版权为Steve Summit 所有，详情见下面的英文版权说明。
(The English version of this FAQ list is Copyright 1990-2004 by Steve Summit. Content from the book 《C Programming FAQs: Frequently Asked Questions》is made available here by permission of the author and the publisher as a service to the community. It is intended to complement the use of the published text and is protected by international copyright laws. The on-line content may be accessed freely for personal use but may not be republished without permission.)