1<html lang="en"> 2<head> 3<title>C++ Comments - Using the GNU Compiler Collection (GCC)</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Using the GNU Compiler Collection (GCC)"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="C-Extensions.html#C-Extensions" title="C Extensions"> 9<link rel="prev" href="Function-Prototypes.html#Function-Prototypes" title="Function Prototypes"> 10<link rel="next" href="Dollar-Signs.html#Dollar-Signs" title="Dollar Signs"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<!-- 13Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 141998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 152010 Free Software Foundation, Inc. 16 17Permission is granted to copy, distribute and/or modify this document 18under the terms of the GNU Free Documentation License, Version 1.3 or 19any later version published by the Free Software Foundation; with the 20Invariant Sections being ``Funding Free Software'', the Front-Cover 21Texts being (a) (see below), and with the Back-Cover Texts being (b) 22(see below). A copy of the license is included in the section entitled 23``GNU Free Documentation License''. 24 25(a) The FSF's Front-Cover Text is: 26 27 A GNU Manual 28 29(b) The FSF's Back-Cover Text is: 30 31 You have freedom to copy and modify this GNU Manual, like GNU 32 software. Copies published by the Free Software Foundation raise 33 funds for GNU development.--> 34<meta http-equiv="Content-Style-Type" content="text/css"> 35<style type="text/css"><!-- 36 pre.display { font-family:inherit } 37 pre.format { font-family:inherit } 38 pre.smalldisplay { font-family:inherit; font-size:smaller } 39 pre.smallformat { font-family:inherit; font-size:smaller } 40 pre.smallexample { font-size:smaller } 41 pre.smalllisp { font-size:smaller } 42 span.sc { font-variant:small-caps } 43 span.roman { font-family:serif; font-weight:normal; } 44 span.sansserif { font-family:sans-serif; font-weight:normal; } 45--></style> 46<link rel="stylesheet" type="text/css" href="../cs.css"> 47</head> 48<body> 49<div class="node"> 50<a name="C++-Comments"></a> 51<a name="C_002b_002b-Comments"></a> 52<p> 53Next: <a rel="next" accesskey="n" href="Dollar-Signs.html#Dollar-Signs">Dollar Signs</a>, 54Previous: <a rel="previous" accesskey="p" href="Function-Prototypes.html#Function-Prototypes">Function Prototypes</a>, 55Up: <a rel="up" accesskey="u" href="C-Extensions.html#C-Extensions">C Extensions</a> 56<hr> 57</div> 58 59<h3 class="section">6.33 C++ Style Comments</h3> 60 61<p><a name="index-g_t_0040code_007b_002f_002f_007d-2565"></a><a name="index-C_002b_002b-comments-2566"></a><a name="index-comments_002c-C_002b_002b-style-2567"></a> 62In GNU C, you may use C++ style comments, which start with ‘<samp><span class="samp">//</span></samp>’ and 63continue until the end of the line. Many other C implementations allow 64such comments, and they are included in the 1999 C standard. However, 65C++ style comments are not recognized if you specify an <samp><span class="option">-std</span></samp> 66option specifying a version of ISO C before C99, or <samp><span class="option">-ansi</span></samp> 67(equivalent to <samp><span class="option">-std=c90</span></samp>). 68 69 </body></html> 70 71