这是一个停车场管理系统，能实现停车场车辆的进出库，并且能实现车辆离开时自动计时和计算停车时所需要交纳的停车费，同时能实现数据的备份和还原。-This is a car park management system, to achieve out of the basement car park of the vehicle, and can automatically calculate the timing and the need to pay for parking when parkin