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87 lines
3.3 KiB
HTML
87 lines
3.3 KiB
HTML
4 years ago
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>difftime (The Red Hat newlib C Library)</title>
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<meta name="description" content="difftime (The Red Hat newlib C Library)">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Timefns.html#Timefns" rel="up" title="Timefns">
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<link href="gmtime.html#gmtime" rel="next" title="gmtime">
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</head>
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<body lang="en">
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<a name="difftime"></a>
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<div class="header">
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<p>
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Next: <a href="gmtime.html#gmtime" accesskey="n" rel="next">gmtime</a>, Previous: <a href="ctime.html#ctime" accesskey="p" rel="prev">ctime</a>, Up: <a href="Timefns.html#Timefns" accesskey="u" rel="up">Timefns</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="difftime_002d_002d_002dsubtract-two-times"></a>
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<h3 class="section">8.4 <code>difftime</code>—subtract two times</h3>
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<a name="index-difftime"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <time.h>
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double difftime(time_t <var>tim1</var>, time_t <var>tim2</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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Subtracts the two times in the arguments: ‘<code><var>tim1</var> - <var>tim2</var></code>’.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The difference (in seconds) between <var>tim2</var> and <var>tim1</var>, as a <code>double</code>.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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ANSI C requires <code>difftime</code>, and defines its result to be in seconds
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in all implementations.
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</p>
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<p><code>difftime</code> requires no supporting OS subroutines.
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</p>
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<br>
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</body>
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</html>
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