说明：  (1) 程序功能：设计一个用来描述汽车的类，使用类的非静态成员变量来表示汽车的车主姓名、当前的速率和当前方向盘的转向角度，使用类的非静态成员方法来表示改变汽车的速率和停车两个操作。
((1) program functions : design a vehicle used to describe the class, using the non-static member variable to indicate names of the owner of a vehicle, the current rate and the current steering angle of the steering wheel. using the members of the non-static method to indicate the rate of change in car parking and two operations.)