说明：  细节决定成败，思路清晰、言简意赅的代码让程序员一目了然；而格式凌乱、拖沓冗长的代码让程序员一头雾水。除了可以正确运行以外，优秀的代码必须具备良好的可读性，编写的代码要使其他人能在最短的时间内理解才行。本书旨在强调代码对人的友好性和可读性
(Detail decides success or failure, clear, concise code, let the programmer be clear at a glance.And format is messy, a drag code let programmers a scratching his head.Besides can correct operation, excellent code must have good readability, write code to make other people can in the shortest possible time to understand.This book aims to emphasize the code readability and friendly to people)