编写一个Car类，具有String类型的属性品牌，具有功能drive； 定义其子类Aodi和Benchi，具有属性：价格、型号；具有功能：变速； 定义主类E，在其main方法中分别创建Aodi和Benchi的对象并测试对象的特 性。

package homework1;

public class Car 
{
    //成员变量
    String pinpai;
    
    //成员方法
    void drive()
    {
        
    }

}

package homework1;

public class Aodi extends Car
{
    //成员变量
    public String jiage;
    public String xinghao;
    public double sudu;
    Aodi(String jiage,String xinghao,double sudu)
    {
        this.sudu=sudu;
        this.jiage=jiage;
        this.xinghao=xinghao;
    }
    
    //成员方法
    double jiasu(double a)
    {
        this.sudu+=a;
        return sudu;
    }
    double jiansu(double b)
    {
        this.sudu-=b;
        return sudu;
    }
}

package homework1;

public class Benchi extends Car
{
        //成员变量
        public String jiage;
        public String xinghao;
        public double sudu;
        
        Benchi(String jiage,String xinghao,double sudu)
        {
            this.sudu=sudu;
            this.jiage=jiage;
            this.xinghao=xinghao;
        }
        
        //成员方法
        double jiasu(double a)
        {
            this.sudu+=a;
            return sudu;
        }
        double jiansu(double b)
        {
            this.sudu-=b;
            return sudu;
        }

}

package homework1;

public class E
{

    public static void main(String[] args) 
    {
        Aodi ad=new Aodi("500000元","A6L",110);
        System.out.println("品牌：Aodi"+"   型号："+ad.xinghao+"   价格："+ad.jiage+"   车速："+ad.sudu);        
        System.out.println("加速30后车速为："+ad.jiasu(30));
        
        Benchi bc=new Benchi("900000元","S 320L",120);
        System.out.println("品牌：Benchi"+"   型号："+bc.xinghao+"   价格："+bc.jiage+"   车速："+bc.sudu);        
        System.out.println("减速30后车速为："+bc.jiansu(30));

    }

}