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+<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>C99</title><meta name="generator" content="DocBook XSL Stylesheets V1.74.0" /><meta name="keywords" content=" ISO C++ , library " /><link rel="home" href="../spine.html" title="The GNU C++ Library Documentation" /><link rel="up" href="numerics_and_c.html" title="Chapter 23. Interacting with C" /><link rel="prev" href="numerics_and_c.html" title="Chapter 23. Interacting with C" /><link rel="next" href="io.html" title="Part XI. Input and Output" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">C99</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="numerics_and_c.html">Prev</a> </td><th width="60%" align="center">Chapter 23. Interacting with C</th><td width="20%" align="right"> <a accesskey="n" href="io.html">Next</a></td></tr></table><hr /></div><div class="sect1" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="numerics.c.c99"></a>C99</h2></div></div></div><p>In addition to the other topics on this page, we'll note here some
+ of the C99 features that appear in libstdc++.
+ </p><p>The C99 features depend on the <code class="code">--enable-c99</code> configure flag.
+ This flag is already on by default, but it can be disabled by the
+ user. Also, the configuration machinery will disable it if the
+ necessary support for C99 (e.g., header files) cannot be found.
+ </p><p>As of GCC 3.0, C99 support includes classification functions
+ such as <code class="code">isnormal</code>, <code class="code">isgreater</code>,
+ <code class="code">isnan</code>, etc.
+ The functions used for 'long long' support such as <code class="code">strtoll</code>
+ are supported, as is the <code class="code">lldiv_t</code> typedef. Also supported
+ are the wide character functions using 'long long', like
+ <code class="code">wcstoll</code>.
+ </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="numerics_and_c.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="numerics_and_c.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="io.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 23. Interacting with C </td><td width="20%" align="center"><a accesskey="h" href="../spine.html">Home</a></td><td width="40%" align="right" valign="top"> Part XI.
+ Input and Output
+
+</td></tr></table></div></body></html>
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