Introduction - If you have any usage issues, please Google them yourself
Write a tariff accounting systems: tariff calculation model: the user electricity tariffs and user charges categories associated with the current price divided by the different ways there are different types, in accordance with the type of electricity can be divided into living electricity Non-living price, commercial price, non-ordinary industrial tariffs and other large industrial electricity.
Functional requirements:
(1) parameters of maintenance: the user types and user price, stored in a file
(2) the actual electricity tariff calculation model correctly computed and the results stored in the file, and output in tabular form
(3) electricity query: Query and display the specified time period specified by the user of electricity records
(4) system statistical functions: According to the monthly, quarterly and annual statistics, respectively.