log4cplus是C++编写的非常有名的开源的日志系统。log4cplus具有线程安全、灵活、以及多粒度控制的特点，通过将信息划分优先级使其可以面向程序调试、运行、测试、和维护等全生命周期； 你可以选择将信息输出到屏幕、文件、NT event log、甚至是远程服务器；通过指定策略对日志进行定期备份等等。-log4cplus is C++ prepared very well-known open source system log. log4cplus with a thread-safe, flexible, and multi-granularity control the characteristics of information by priority so that it can be divided into process-oriented debugging, running, testing, and maintenance lifecycle　you can choose the information output to the screen, documents, NT event log, or even the remote server　by specifying the strategy of regular log backups.