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                <h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">Standard library header</span> &lt;ctime&gt;</h1>
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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="#Functions"><span class="tocnumber">1</span> <span class="toctext">Functions</span></a>
<ul>
<li class="toclevel-2"><a href="#Time_manipulation"><span class="tocnumber">1.1</span> <span class="toctext">Time manipulation</span></a></li>
<li class="toclevel-2"><a href="#Format_conversions"><span class="tocnumber">1.2</span> <span class="toctext">Format conversions</span></a></li>
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<li class="toclevel-1 tocsection-2"><a href="#Constants"><span class="tocnumber">2</span> <span class="toctext">Constants</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="#Types"><span class="tocnumber">3</span> <span class="toctext">Types</span></a></li>
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<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/header/ctime&amp;action=edit&amp;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>
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<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/difftime.html" title="cpp/chrono/c/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:cpp/chrono/c/dsc_difftime&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/time.html" title="cpp/chrono/c/time"> <span class="t-lines"><span>time</span></span></a></div></div>
</td>
<td>   returns the current 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:cpp/chrono/c/dsc_time&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/clock.html" title="cpp/chrono/c/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:cpp/chrono/c/dsc_clock&amp;action=edit">&#91;edit&#93;</a></span>
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<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Format_conversions">  Format conversions </span></h5>
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<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/asctime.html" title="cpp/chrono/c/asctime"> <span class="t-lines"><span>asctime</span></span></a></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:cpp/chrono/c/dsc_asctime&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/ctime.html" title="cpp/chrono/c/ctime"> <span class="t-lines"><span>ctime</span></span></a></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:cpp/chrono/c/dsc_ctime&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/strftime.html" title="cpp/chrono/c/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:cpp/chrono/c/dsc_strftime&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/wcsftime.html" title="cpp/chrono/c/wcsftime"> <span class="t-lines"><span>wcsftime</span></span></a></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:cpp/chrono/c/dsc_wcsftime&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/gmtime.html" title="cpp/chrono/c/gmtime"> <span class="t-lines"><span>gmtime</span></span></a></div></div>
</td>
<td>   converts time since epoch to calendar time expressed as Universal Coordinated 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:cpp/chrono/c/dsc_gmtime&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/localtime.html" title="cpp/chrono/c/localtime"> <span class="t-lines"><span>localtime</span></span></a></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:cpp/chrono/c/dsc_localtime&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/mktime.html" title="cpp/chrono/c/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:cpp/chrono/c/dsc_mktime&amp;action=edit">&#91;edit&#93;</a></span>
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<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/header/ctime&amp;action=edit&amp;section=2" title="Edit section: Constants">edit</a>]</span> <span class="mw-headline" id="Constants">Constants</span></h3>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/CLOCKS_PER_SEC.html" title="cpp/chrono/c/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:cpp/chrono/c/dsc_CLOCKS_PER_SEC&amp;action=edit">&#91;edit&#93;</a></span>
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<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/header/ctime&amp;action=edit&amp;section=3" title="Edit section: Types">edit</a>]</span> <span class="mw-headline" id="Types">Types</span></h3>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/tm.html" title="cpp/chrono/c/tm"> <span class="t-lines"><span>tm</span></span></a></div></div>
</td>
<td>   calendar time type <br /> <span class="t-mark">(class)</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:cpp/chrono/c/dsc_tm&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/time_t.html" title="cpp/chrono/c/time t"> <span class="t-lines"><span>time_t</span></span></a></div></div>
</td>
<td>   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:cpp/chrono/c/dsc_time_t&amp;action=edit">&#91;edit&#93;</a></span>
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<td>  <div class="t-dsc-member-div"><div><a href="../chrono/c/clock_t.html" title="cpp/chrono/c/clock t"> <span class="t-lines"><span>clock_t</span></span></a></div></div>
</td>
<td>   process running time <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:cpp/chrono/c/dsc_clock_t&amp;action=edit">&#91;edit&#93;</a></span>
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