C Macro

http://blog.gslin.org/archives/2006/11/02/858/c-%E7%9A%84-macro
http://blog.gslin.com/2006/11/c-macro-part-i.html
http://blog.gslin.com/2006/11/c-macro-part-ii.html
http://blog.gslin.com/2006/11/c-macro-part-iii.html
http://www.jeffhung.net/blog/articles/jeffhung/1013/