infocuboid.java

Java 程序设计源码 只提供了部分

class Cuboid {
	int height,width,length;

	public int volume() {
		return height * width * length;
	}
}

class CuboidWeight extends Cuboid {
	int density;

	public int weight() {
		return super.volume() * density;
	}
}

class CuboidValue extends CuboidWeight {
	int value;

	public int cost() {
		return weight() * value;
	}
}

public class InfoCuboid {
	public static void main(String[] args) {
		CuboidValue cv = new CuboidValue();

		System.out.println(cv.volume());
		System.out.println(cv.weight());
		System.out.println(cv.cost());
	}
}