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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>getw</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_005_797"> </a>NAME</h4><blockquote>getw - get a word from a stream(<b>LEGACY</b>)</blockquote><h4><a name = "tag_000_005_798"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="stdio.h.html">stdio.h</a>>int getw(FILE *<i>stream</i>);</code></pre></blockquote><h4><a name = "tag_000_005_799"> </a>DESCRIPTION</h4><blockquote>The<i>getw()</i>function reads the next word from the<i>stream</i>.The size of a word is the size of an<b>int</b>and may vary from machine to machine. The<i>getw()</i>function presumes no special alignment in the file.<p>The<i>getw()</i>function may mark the<i>st_atime</i>field of the file associated with<i>stream</i>for update.The<i>st_atime</i>field will be marked for update by the first successful execution of<i><a href="fgetc.html">fgetc()</a></i>,<i><a href="fgets.html">fgets()</a></i>,<i><a href="fread.html">fread()</a></i>,<i><a href="getc.html">getc()</a></i>,<i><a href="getchar.html">getchar()</a></i>,<i><a href="gets.html">gets()</a></i>,<i><a href="fscanf.html">fscanf()</a></i>or<i><a href="scanf.html">scanf()</a></i>using<i>stream</i>that returns data not supplied by a prior call to<i><a href="ungetc.html">ungetc()</a></i>.<p>This interface need not be reentrant.</blockquote><h4><a name = "tag_000_005_800"> </a>RETURN VALUE</h4><blockquote>Upon successful completion,<i>getw()</i>returns the next word from the input stream pointedto by<i>stream</i>.If the stream is at end-of-file, the end-of-file indicator forthe stream is set and<i>getw()</i>returns EOF.If a read error occurs, the error indicator for the stream is set,<i>getw()</i>returns EOF and sets<i>errno</i>to indicate the error.</blockquote><h4><a name = "tag_000_005_801"> </a>ERRORS</h4><blockquote>Refer to<i><a href="fgetc.html">fgetc()</a></i>.</blockquote><h4><a name = "tag_000_005_802"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_005_803"> </a>APPLICATION USAGE</h4><blockquote>Because of possible differences in word length and byte ordering,files written using<i><a href="putw.html">putw()</a></i>are implementation-dependent, and possibly cannot be read using<i>getw()</i>by a different application or by the same application on adifferent processor.<p>Because the representation of EOF is a valid integer,applications wishing to check for errors should use<i><a href="ferror.html">ferror()</a></i>and<i><a href="feof.html">feof()</a></i>.<p>The<i>getw()</i>function is inherently byte stream-oriented and is not tenable in thecontext of either multibyte character streams or wide-character streams. Application programmers are recommended to use one of thecharacter-based input functions instead.</blockquote><h4><a name = "tag_000_005_804"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_005_805"> </a>SEE ALSO</h4><blockquote><i><a href="feof.html">feof()</a></i>,<i><a href="ferror.html">ferror()</a></i>,<i><a href="getc.html">getc()</a></i>,<i><a href="putw.html">putw()</a></i>,<i><a href="stdio.h.html"><stdio.h></a></i>,<i><a href="utmpx.h.html"><utmpx.h></a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from Issue 1 of the SVID.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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