参考自:
http://www.cppblog.com/mzty/archive/2007/03/14/19819.html
http://hi.baidu.com/dinglinbin/blog/item/887e7c30c12e429ba9018e30
参考自:
http://www.cppblog.com/mzty/archive/2007/03/14/19819.html
http://hi.baidu.com/dinglinbin/blog/item/887e7c30c12e429ba9018e30