数据结构的停车场管理，包括初始化停车场、新车进场、第一辆车出厂、判断当前停车场是否为空、输出所有信息、查找车辆信息等

-Parking management data structures, including the initialization parking, car entry, the first car factory, to determine whether the current parking lot is empty, the output of all the information, find the vehicle information