会python真的可以为所欲为0(回)
381天前
这里还有人吗1(回)
566天前这里还有人吗0(回)
566天前
每天面对着电脑屏幕，敲打键盘。我所面对的并不只是代码，而是一种生活方式。0(回)
791天前到处都是羊，不想上班0(回)
871天前
鸽子
0(回)
875天前class Circle { |
protected double radius; |
public Circle(double r){ |
radius=r; |
} |
public double getArea(){ |
return Math.PI*radius*radius; |
} |
} |
class Cylinder extends Circle{ |
private double height; |
public Cylinder(double r, double h){ |
super(r); |
height = h; |
} |
public double getVolume(){ |
return super.getArea()*height; |
} |
} |
public class Main { |
public static void main(String[] args) { |
Cylinder c = new Cylinder(5.0,10.0); |
System.out.println(c.getArea()); |
System.out.print(c.getVolume()); |
} |
} |
