说明：  名外企程序员面试宝典，面试前临时抱抱佛脚还是有用的，很基础，讲述的都是平时被容易被忽视，但很关键的问题
(foreign company interview programming tutorials, it is very good to go through it before a c++ interview, it is basice and tells about the problems that we easily ignore while being asked )