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<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN"><!-- This collection of hypertext pages is Copyright 1995-2005 by Steve Summit. --><!-- Content from the book "C Programming FAQs: Frequently Asked Questions" --><!-- (Addison-Wesley, 1995, ISBN 0-201-84519-9) 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!-- but may not be published or retransmitted without explicit permission. --><!-- --><!-- this page built Sat Dec 24 21:47:46 2005 by faqproc version 2.7 --><!-- from source file stdio.sgml dated Wed Dec 21 13:07:57 2005 --><!-- corresponding to FAQ list version 4.0 --><html><!-- Mirrored from c-faq.com/stdio/fopenbinary.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 07:58:58 GMT --><head><meta name=GENERATOR content="faqproc"><title>Question 12.38</title><link href="binaryio.html" rev=precedes><link href="stdinbinary.html" rel=precedes><link href="index.html" rev=subdocument></head><body bgcolor="#ffffff"><a href="binaryio.html" rev=precedes><img src="../images/buttonleft.gif" alt="prev"></a><a href="index.html" rev=subdocument><img src="../images/buttonup.gif" alt="up"></a><a href="stdinbinary.html" rel=precedes><img src="../images/buttonright.gif" alt="next"></a> <a href="../index-2.html"><img src="../images/buttontop.gif" alt="top/contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><hr><p><!-- qbegin --><h1>comp.lang.c FAQ list<font color=blue>·</font><!-- qtag -->Question 12.38</h1><p><font face=Helvetica size=8 color=blue><b>Q:</b></font>How can I read a binary data file properly?I'm occasionally seeing <TT>0x0a</TT> and <TT>0x0d</TT> values getting garbled,andI seemto hit EOF prematurely if the data contains the value <TT>0x1a</TT>.</p><p><hr><p><font face=Helvetica size=8 color=blue><b>A:</b></font>When you're reading a binary data file,you shouldspecify <TT>"rb"</TT> modewhen calling <TT>fopen</TT>,to make sure that text file translations do not occur.Similarly,when writing binary data files, use <TT>"wb"</TT>.(Under operating systemssuch as Unixwhich don't distinguish between text and binary files,<TT>"b"</TT>may not be required,but is harmless.)</p><p>Note thatthe text/binary distinction is made when you open the file:once a file is open,it doesn't matter which I/O calls you use on it.See alsoquestions <a href="binaryio.html">12.37</a>, <a href="textvsbinary.html">12.40</a>, <a href="extconform.html">12.42</a>, and <a href="../misc/binaryfiles.html">20.5</a>.</p><p>References:ISO Sec. 7.9.5.3<br>H&S Sec. 15.2.1 p. 348<br></p><!-- aend --><p><hr><a href="binaryio.html" rev=precedes><img src="../images/buttonleft.gif" alt="prev"></a><a href="index.html" rev=subdocument><img src="../images/buttonup.gif" alt="up"></a><a href="stdinbinary.html" rel=precedes><img src="../images/buttonright.gif" alt="next"></a> <a href="../questions.html"><img src="../images/buttontop.gif" alt="contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><br><!-- lastfooter --><a href="../about.html">about this FAQ list</a> <a href="../eskimo.html">about eskimo</a> <a href="../search.html">search</a> <a href="../feedback.html">feedback</a> <a href="copyright.html">copyright</a><p>Hosted by<a href="http://www.eskimo.com/"><img src="../../www.eskimo.com/img/link/eskitiny.gif" alt="Eskimo North"></a></body><!-- Mirrored from c-faq.com/stdio/fopenbinary.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 07:58:58 GMT --></html>⌨️ 快捷键说明
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