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<tr class="t-nv-h1"><td colspan="5"> Functions</td></tr>
<tr class="t-nv-h2"><td colspan="5"> Time manipulation</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/difftime.html" title="c/chrono/difftime"><span class="t-lines"><span>difftime</span></span></a></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/timespec_get.html" title="c/chrono/timespec get"><span class="t-lines"><span>timespec_get</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/strftime.html" title="c/chrono/strftime"><span class="t-lines"><span>strftime</span></span></a></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/CLOCKS_PER_SEC.html" title="c/chrono/CLOCKS PER SEC"><span class="t-lines"><span>CLOCKS_PER_SEC</span></span></a></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/tm.html" title="c/chrono/tm"><span class="t-lines"><span>tm</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/time_t.html" title="c/chrono/time t"><span class="t-lines"><span>time_t</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/clock_t.html" title="c/chrono/clock t"><span class="t-lines"><span>clock_t</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/timespec.html" title="c/chrono/timespec"><span class="t-lines"><span>timespec</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
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<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="chrono.html#Functions"><span class="tocnumber">1</span> <span class="toctext">Functions</span></a>
<ul>
<li class="toclevel-2"><a href="chrono.html#Time_manipulation"><span class="tocnumber">1.1</span> <span class="toctext">Time manipulation</span></a></li>
<li class="toclevel-2"><a href="chrono.html#Format_conversions"><span class="tocnumber">1.2</span> <span class="toctext">Format conversions</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-2"><a href="chrono.html#Constants"><span class="tocnumber">2</span> <span class="toctext">Constants</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="chrono.html#Types"><span class="tocnumber">3</span> <span class="toctext">Types</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="chrono.html#References"><span class="tocnumber">4</span> <span class="toctext">References</span></a></li>
<li class="toclevel-1 tocsection-5"><a href="chrono.html#See_also"><span class="tocnumber">5</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/chrono&action=edit&section=1" title="Edit section: Functions">edit</a>]</span> <span class="mw-headline" id="Functions">Functions</span></h3>
<table class="t-dsc-begin">
<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Time_manipulation"> Time manipulation </span></h5>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><time.h></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/difftime.html" title="c/chrono/difftime"> <span class="t-lines"><span>difftime</span></span></a></div></div>
</td>
<td> computes the difference between times <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_difftime&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/time.html" title="c/chrono/time"> <span class="t-lines"><span>time</span></span></a></div></div>
</td>
<td> returns the current calendar time of the system as time since epoch <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_time&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/clock.html" title="c/chrono/clock"> <span class="t-lines"><span>clock</span></span></a></div></div>
</td>
<td> returns raw processor clock time since the program is started <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_clock&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/timespec_get.html" title="c/chrono/timespec get"> <span class="t-lines"><span>timespec_get</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(since C11)</span></span></span></div></div>
</td>
<td> returns the calendar time based on a given time base <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_timespec_get&action=edit">[edit]</a></span>
</td></tr>
<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Format_conversions"> Format conversions </span></h5>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><time.h></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/asctime.html" title="c/chrono/asctime"> <span class="t-lines"><span>asctime</span><span>asctime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td> converts a <code>tm</code> object to a textual representation <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_asctime&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/ctime.html" title="c/chrono/ctime"> <span class="t-lines"><span>ctime</span><span>ctime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td> converts a <code>time_t</code> object to a textual representation <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_ctime&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/strftime.html" title="c/chrono/strftime"> <span class="t-lines"><span>strftime</span></span></a></div></div>
</td>
<td> converts a <code>tm</code> object to custom textual representation <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_strftime&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><wchar.h></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/wcsftime.html" title="c/chrono/wcsftime"> <span class="t-lines"><span>wcsftime</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div>
</td>
<td> converts a tm object to custom wide string textual representation <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_wcsftime&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><time.h></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/gmtime.html" title="c/chrono/gmtime"> <span class="t-lines"><span>gmtime</span><span>gmtime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td> converts time since epoch to calendar time expressed as Coordinated Universal Time (UTC) <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_gmtime&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/localtime.html" title="c/chrono/localtime"> <span class="t-lines"><span>localtime</span><span>localtime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td> converts time since epoch to calendar time expressed as local time <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_localtime&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/mktime.html" title="c/chrono/mktime"> <span class="t-lines"><span>mktime</span></span></a></div></div>
</td>
<td> converts calendar time to time since epoch <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_mktime&action=edit">[edit]</a></span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/chrono&action=edit&section=2" title="Edit section: Constants">edit</a>]</span> <span class="mw-headline" id="Constants">Constants</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><time.h></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/CLOCKS_PER_SEC.html" title="c/chrono/CLOCKS PER SEC"> <span class="t-lines"><span>CLOCKS_PER_SEC</span></span></a></div></div>
</td>
<td> number of processor clock ticks per second <br /> <span class="t-mark">(macro constant)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_CLOCKS_PER_SEC&action=edit">[edit]</a></span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/chrono&action=edit&section=3" title="Edit section: Types">edit</a>]</span> <span class="mw-headline" id="Types">Types</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><time.h></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/tm.html" title="c/chrono/tm"> <span class="t-lines"><span>tm</span></span></a></div></div>
</td>
<td> calendar time type <br /> <span class="t-mark">(struct)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_tm&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/time_t.html" title="c/chrono/time t"> <span class="t-lines"><span>time_t</span></span></a></div></div>
</td>
<td> calendar time since epoch type <br /> <span class="t-mark">(typedef)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_time_t&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/clock_t.html" title="c/chrono/clock t"> <span class="t-lines"><span>clock_t</span></span></a></div></div>
</td>
<td> processor time since era type <br /> <span class="t-mark">(typedef)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_clock_t&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="chrono/timespec.html" title="c/chrono/timespec"> <span class="t-lines"><span>timespec</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(since C11)</span></span></span></div></div>
</td>
<td> time in seconds and nanoseconds <br /> <span class="t-mark">(struct)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/chrono/dsc_timespec&action=edit">[edit]</a></span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/chrono&action=edit&section=4" title="Edit section: References">edit</a>]</span> <span class="mw-headline" id="References">References</span></h3>
<div class="t-ref-std-11">
<ul><li> C11 standard (ISO/IEC 9899:2011):
</li></ul>
<dl><dd><ul><li> 7.27 Date and time <time> (p: 388-397)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.29.5.1 The wcsftime function (p: 439-440)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.31.14 Date and time <time.h> (p: 456)
</li></ul>
</dd></dl>
<div class="t-ref-std-c99">
<ul><li> C99 standard (ISO/IEC 9899:1999):
</li></ul>
<dl><dd><ul><li> 7.23 Date and time <time.h> (p: 338-347)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.24.5.1 The wcsftime function (p: 385-386)
</li></ul>
</dd></dl>
<div class="t-ref-std-c89">
<ul><li> C89/C90 standard (ISO/IEC 9899:1990):
</li></ul>
<dl><dd><ul><li> 4.12 DATE AND TIME <time.h>
</li></ul>
</dd></dl>
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/chrono&action=edit&section=5" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td colspan="2"> <div class="t-dsc-see"><span><a href="../cpp/chrono/c.html" title="cpp/chrono/c">C++ documentation</a></span> for <span class="t-dsc-see-tt"><span>C Date and time utilities</span></span></div>
</td></tr>
</table></div>
<p></time>
</p>
</div>
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