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<h5 class="subsubsection">15.4.1.4 C and C<tt>++</tt> Defaults</h5>

<p><a name="index-C-and-C_0040t_007b_002b_002b_007d-defaults-1000"></a>
If you allow <span class="sc">gdb</span> to set range checking automatically, it
defaults to <code>off</code> whenever the working language changes to
C or C<tt>++</tt>.  This happens regardless of whether you or <span class="sc">gdb</span>
selects the working language.

   <p>If you allow <span class="sc">gdb</span> to set the language automatically, it
recognizes source files whose names end with <samp><span class="file">.c</span></samp>, <samp><span class="file">.C</span></samp>, or
<samp><span class="file">.cc</span></samp>, etc, and when <span class="sc">gdb</span> enters code compiled from one of
these files, it sets the working language to C or C<tt>++</tt>. 
See <a href="Automatically.html#Automatically">Having <span class="sc">gdb</span> Infer the Source Language</a>,
for further details.

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