class ctest11{
    public static void main(String args[]){
        Soarer soarer = new Soarer();

        soarer.openRoof();
        if (soarer.roofOpenFlag){
            System.out.println("屋根が開いています");
        }else{
            System.out.println("屋根が閉じています");
        }

        soarer.accele();
        System.out.println("現在の速度は" + soarer.speed + "キロです");
    }
}

class Car{
    int speed = 0;

    public void accele(){
        speed += 5;
    }

    public void brake(){
        speed -= 5;
    }
}

class Soarer extends Car{
    boolean roofOpenFlag = false;

    public void openRoof(){
        roofOpenFlag = true;
    }

    public void closeRoof(){
        roofOpenFlag = true;
    }
}