问题的提出：编写一个长途电话计费程序，计费规则是每6秒钟0.06元，要求能输入发话地、收话地，输出话费。-Of the problem: write a long-distance telephone billing procedures, billing rules is 0.06 yuan per 6 seconds, required to enter the speaker, the closing words, the output charges.

朋友写的C++645通讯程序，支持645-1997与645-2007,支持自已组帧程序自动添加校验码通讯，可以增加数据标识定义，里面还有部分关于费控通讯代码，挺好，拿来分享-Friend write C++645 communications program to support the 645-1997 and 645-2007, to support their own group the frame program automatically adds the checksum commu