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;
}
}
class DemoBoxWeight {
public static void main(String args[]) {
BoxWeight mybox1 = new BoxWeight(10, 20, 15, 34.3);
BoxWeight mybox2 = new BoxWeight(2, 3, 4, 0.076);
double vol;
vol = mybox1.volume();
System.out.println(vol);
System.out.println(mybox1.weight);
System.out.println();
vol = mybox2.volume();
System.out.println(vol);
System.out.println(mybox2.weight);
}
}