说明：  通过广播数据包方式实现数据通讯，广播数据包主机和接受数据包主机在同一文件中，下载以后，分别放到两个文件中，必须分别进行编译。
(The realization of the radio packet data communications, radio host and receive data packet data packet the host in the same document, download later, respectively, into two documents, must be separately compiled.)