电信计费系统预处理功能模拟 本课题以中国电信语音业务的话单批价处理系统为原型参照，要求对文件中存储的话单数据进行排序、查找、计算、显示等操作。-Telecom Billing System pre-processing and simulation of the topics to China Telecom voice services, then price of a single batch processing system for the prototype reference document requires a single data store, then sort, find, calculate, display and other operations.