说明：  华为公司内部资料，硬件工程师必读的，尤其对刚毕业没有任何开发经验的人，它可以带你登堂入室，给你一个良好的开发习惯。
(Huawei internal information, hardware engineers required reading, especially right after graduation without any experience in the development, it can take you tap, you develop a good habit.)