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  • Circle

    class Circle{
    double radius;
    Circle(double r){
    radius=r;
    }
    double computerArea(){
    return 3.14*radius*radius;
    }
    void setRadius(double newRadius){
    radius=newRadius;
    }
    double getRadius(){
     return radius;
     }
     }
     class Cone{
      Circle bottom;
      double height;
      Cone(Circle c,double h){
       bottom=c;
       height=h;
       }
       double computerVolume(){
        double volume;
        volume=bottom.computerArea()*height/3.0;
        return volume;
        }
        void setBottomRadius(double r){
         bottom.setRadius(r);
         }
         double getBottomRadius(){
          return bottom.getRadius();
          }
          }
          public class Example4_9{
           public static void main(String args[]){
            Circle circle=new Circle(8);
            Cone circular=new Cone(circle,18);
            System.out.println("circle bottom半径: "+circular.getBottomRadius());
            System.out.println("circle 体积: "+circular.computerVolume());
            circular.setBottomRadius(88);
            System.out.println("circle bottom半径: "+circular.getBottomRadius());
            System.out.println("circle 体积: "+circular.computerVolume());
            }
            }

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  • 原文地址:https://www.cnblogs.com/agony/p/2985391.html
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