说明：  单片机语言C51应用实战集锦。里面介绍了c51开发程序，举了40个例子！如实时时钟DS1302、DS1820温度测量等例子
(C51 single-chip application of combat allehanda language. Introduction of the C51 inside the development process, cited 40 examples! Such as real-time clock, DS1302, DS1820 temperature measurement examples)