map文章

STL map常用操作简介
http://www.kuqin.com/cpluspluslib/20071231/3264.html

STL中map用法详解
http://www.kuqin.com/cpluspluslib/20071231/3265.html
http://blog.sina.com.cn/s/blog_a9303fd9010195hm.html

buffer的线索
https://www.cnblogs.com/zhjh256/p/6346501.html