C/C++函数指针

http://hipercomer.blog.51cto.com/4415661/792300

http://www.cnblogs.com/ccdev/archive/2012/12/19/2825355.html

http://blog.csdn.net/boyxiaolong/article/details/6645681

http://blog.csdn.net/wingfiring/article/details/498242