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<h3 class="section">C++ Style Comments</h3>
<p>In GNU C, you may use C++ style comments, which start with <code>//</code> and
continue until the end of the line. Many other C implementations allow
such comments, and they are included in the 1999 C standard. However,
C++ style comments are not recognized if you specify an <code>-std</code>
option specifying a version of ISO C before C99, or <code>-ansi</code>
(equivalent to <code>-std=c89</code>).
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