用C语言写出来程序非常的简练，它是一种模块化的语言，一种比汇编更高级的语言，但是就是这样一种语言也还是有它不足之处：它的延时很不好控制，我们常常很难知道一段延时程序它的精确延时到底是多少，这和汇编延时程序没发比。但有时后写程序又不得不要用到比较精确的延时，虽然说可以用混合编程的方式解决，但这种方式不是每个人都能掌握，且写起来也麻烦。所以，通过测试我给大家提供一个延时子程序模块，并以此给一个出我们经常用到的延时的数据表格-Using C language written in a very simple procedure, it is a modular language, a compilation of more senior than the language, but is a language still has its shortcomings: it is very bad delay control , we have a period of latency is often difficult to know the exact process it in the end is how much delay, which delay the procedures and compilation of no-fat ratio. After the writing process but sometimes had to use the delay to the more accurate, although that can be mixed programming solution, but not this way everyone can grasp, and also the trouble to write. Therefore, let us pass the test to provide a time delay subroutine modules, and thus to one of our frequently used forms of data latency