http://www.cplusplus.com/articles/2z86b7Xj/
https://msdn.microsoft.com/en-us/library/h552b3ca.aspx
https://en.wikipedia.org/wiki/Precompiled_header
http://stackoverflow.com/questions/676385/stdafx-h-when-do-i-need-it#
原文：http://www.cnblogs.com/qrlozte/p/4852738.html