📄 difftime.html

📁 unix 下的C开发手册,还用详细的例程。
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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>difftime</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_003_085">&nbsp;</a>NAME</h4><blockquote>difftime - compute the difference between two calendar time values</blockquote><h4><a name = "tag_000_003_086">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>#include &lt;<a href="time.h.html">time.h</a>&gt;double difftime(time_t <i>time1</i>, time_t <i>time0</i>);</code></pre></blockquote><h4><a name = "tag_000_003_087">&nbsp;</a>DESCRIPTION</h4><blockquote>The<i>difftime()</i>function computes the difference between two calendar times (asreturned by<i><a href="time.html">time()</a></i>):<i>time1</i>-<i>time0</i>.</blockquote><h4><a name = "tag_000_003_088">&nbsp;</a>RETURN VALUE</h4><blockquote>The<i>difftime()</i>function returns the difference expressed in seconds as a type<b>double</b>.</blockquote><h4><a name = "tag_000_003_089">&nbsp;</a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_003_090">&nbsp;</a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_003_091">&nbsp;</a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_003_092">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_003_093">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="asctime.html">asctime()</a></i>,<i><a href="clock.html">clock()</a></i>,<i><a href="ctime.html">ctime()</a></i>,<i><a href="gmtime.html">gmtime()</a></i>,<i><a href="localtime.html">localtime()</a></i>,<i><a href="mktime.html">mktime()</a></i>,<i><a href="strftime.html">strftime()</a></i>,<i><a href="strptime.html">strptime()</a></i>,<i><a href="time.html">time()</a></i>,<i><a href="utime.html">utime()</a></i>,<i><a href="time.h.html">&lt;time.h&gt;</a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from the ISO C standard.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 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>
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