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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>time</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_010_016"> </a>NAME</h4><blockquote>time - get time</blockquote><h4><a name = "tag_000_010_017"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="time.h.html">time.h</a>>time_t time(time_t *<i>tloc</i>);</code></pre></blockquote><h4><a name = "tag_000_010_018"> </a>DESCRIPTION</h4><blockquote>The<i>time()</i>function returns the value of time in seconds since the Epoch.<p>The<i>tloc</i>argument points to an area where the return value is also stored. If<i>tloc</i>is a null pointer, no value is stored.</blockquote><h4><a name = "tag_000_010_019"> </a>RETURN VALUE</h4><blockquote>Upon successful completion,<i>time()</i>returns the value of time. Otherwise, (<b>time_t</b>)-1 is returned.</blockquote><h4><a name = "tag_000_010_020"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_010_021"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_022"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_023"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_024"> </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="difftime.html">difftime()</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="utime.html">utime()</a></i>,<i><a href="time.h.html"><time.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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