就C++而言，不少程序员只是简单地用printf来输出日志，或者临时写个日志类，log4cpp等比较“重型”的日志库的使用率反而并不怎么高（至少从我经历的项目而言）。也许是不想为不需要的功能付出额外的学习成本，但无论如何，对于通用类别的工具采取临时手写的方式来应付，从长远考虑，在功能性和健壮性方面是得不偿失的。写这个日志类(yaolog)的最初的想法只是为了实现“输出到文件的带有时间信息的printf”，后来历经不同项目需求的“拷问”，借鉴和引用了很多开源代码（在此对那些作者表示感谢），就成了现在这个样子-C++ is concerned, many programmers simply use printf to output logs, or temporary write a log type, log4cpp other more　heavy　usage log library but not how high (at least　my experience of project Introduction). Perhaps not want to pay the extra cost for unwanted features to learn, but in any case, for the general class of tools to take temporary handwriting way to cope with the long term in terms of functionality and robustness is worth the candle. Write this log classes (yaolog) The initial idea is to achieve　with the time information is output to a file printf , and later through the different needs of the project,　torture , reference and cite a lot of open source code (in this case those of thanked), it becomes like this now