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//program to inherit a class boxweight from class from box

class box
{
    double width;
    double height;
    double depth;
    box(box ob)
    {
        width=ob.width;
        height=ob.height;
        depth=ob.depth;
    }
    box(double w,double h,double d)
    {
        width=w;
        height=h;
        depth=d;
    }
    box()
    {
        width=-1;
        height=-1;
        depth=-1;
    }
    box(double len)
    {
        width=height=depth=len;
    }
    double volume()
    {
        return width*height*depth;
    }
}
class boxweight extends box
{
    double weight;
    boxweight(double w,double h,double d,double m)
    {
        width=w;
        height=h;
        depth=d;
        weight=m;
              
    } 
}
public class boxinheritance {
    public static void main(String[] args) {
        boxweight box1=new boxweight(10,20,15,34.3);
        boxweight box2=new boxweight(2,3,4,0.076);
        double vol;
        vol=box1.volume();
        System.out.println("Volume of box1 is " + vol);
        System.out.println("Weight of box1 is " + box1.weight);
        
        vol=box2.volume();
        System.out.println("Volume of box2 is " + vol);
        System.out.println("Weight of box2 is " + box2.weight);
}
}