学习C++，先学串口编程，本程序就是以串口作为编程对象，进行针对串口的数据接收与发送，内含丰富的注释，纯个人理解！-To learn C++ learn first serial programming, the program is as a programming object to the serial port for serial data reception and transmission, contains a wealth of comments, pure personal

这是用C语言做的， 可以实现串口通讯的程序(This is done using C language serial communication procedures)