// app9_6, method的覆蓋
class CCircle   // 父類CCircle
{
   protected double radius;
   protected static double pi=3.14;
   
   public CCircle(double r){
      radius=r;
   }
   public void show(){      // 父類里的show() method
      System.out.println("radius="+radius);
   }
}   

class CCoin extends CCircle   // 子類CCoin
{
   private int value;
   
   public CCoin(double r,int v){
      super(r);
      value=v;
   }
   public void show(){       // 子類里的show() method
      System.out.println("radius= "+radius+", value= "+value);
   }
}

public class app9_6
{
   public static void main(String args[]){
      CCoin coin=new CCoin(2.0,5);
      coin.show();
   }
}