有一个汽车类vehicle，它具有一个需传递参数的构造函数，类中的数据成员车轮个数wheels和车重weight放在保护段中；小车类car是它的私有派生类，其中包含载人数passenger-load；卡车类truck是vehicle的私有派生类，其中包含载人数passenger-load和重量payload。每个类都有相关数据的输出方法。-have an auto vehicle, it has a need to transfer parameters Constructors, Class

对卡车和小汽车的重量进行判断，并分类，当输入卡车时即可现实重量-Of trucks and cars to determine the weight and classification, when you enter the truck when the weight of reality

52.轮胎正常气压是延长车辆使用寿命保障 53.车辆突发故障与排除 54.车装电脑检修常识 -52. Tire pressure is normal to extend the service life of the protection of 53 vehicles. Cars rule out the possibility of sudden failure with 54. Overhaul trucks loaded computer knowledge