题目：高速公路计费系统设计







功能：1、在某高速公路出口收费处，对三种类型的车辆计费，大型车每公里0。5元，中型车每公里0。4元，小型车每公里0。3元,来车验条，乘公里数即得该收的款项。在交班时要统计出总金额数。



2、保存：将相关数据写入磁盘文件，便于存、取操作。



分步实施：



1、初步完成总体设计，搭好框架，确定人机对话的界面，确定函数个数；



2、完成最低要求：建立一个只有三个入口的计费系统，并能进行统计计算，打印出报表；



3、进一步要求：1）每次登录时读取上次保存在磁盘文件中的收费总额。



2）完成任意多个入口的通用系统

-Title: Highway Design billing system



　



Features: 1, at a highway exit fees, charges for three types of vehicles, large vehicles per km 0.5 yuan, mid-sized car per km 0.4 yuan, a small car per kilometer 0.3 yuan to cart experience of, by mileage that was the amount collected. When the shift to the statistics of the number of the total amount.



2, save: The data written to disk files, easy to deposit, take action.



Step by step:



　　　1, the initial completion of the overall design, setting up the framework to determine the man-machine interface dialogue, to determine the function of the number　



　　　2, complete the minimum requirements: only three entrance of the establishment of a billing system, and to perform statistical calculations, print out the report　



　　　3, further requirements: 1) every time you log on disk when the file was last read in the total charges.



2) completion of any number of common system for the entrance