一套基于VC++的长途电话计费系统。挺好用的，仅参考-a VC-based long-distance telephone billing system. Very well, the only reference

用visual C++编写的电话计费系统，适合大二学生使用，里面附带数据库！-Using visual C++ to prepare a telephone billing system, suitable for sophomore students, which comes with a database!

一个由VC编写的，基于sql server数据库的宾馆程控电话计费系统的源程序-An hotel program controlled telephone billing system ,writen by C++

本系统开发的主要目的是用户通过拨打本系统的接入号，可以在系统中与全国范围的用户进行语音聊天、使用计费电话卡、语音聊天回拨功能。- The main purpose of this system is that the user develop the system by dialing an access number, you can in the system and the user nationwide voice chat, using a billing telephone ca