*** Doxygen的使用
文档在/usr/share/doc/doxygen/html下面，也可以访问官方网址：http://www.stack.nl/~dimitri/doxygen/
或者http://www.doxygen.org

*** 配合emacs的使用--Doxymacs
http://doxymacs.sourceforge.net/
常用的按键：
 Default key bindings are:

    * C-c d ? will look up documentation for the symbol under the point.
    * C-c d r will rescan your Doxygen tags file.
    * C-c d f will insert a Doxygen comment for the next function.
    * C-c d i will insert a Doxygen comment for the current file.
    * C-c d ; will insert a Doxygen comment for a member variable on the current line (like M-;).
    * C-c d m will insert a blank multi-line Doxygen comment.
    * C-c d s will insert a blank single-line Doxygen comment.
    * C-c d @ will insert grouping comments around the current region.

*** 测试一下
要使用中文的话，在配置文件中必须设置：
OUTPUT_LANGUAGE        = Chinese