public class Casting2 {
    
    public static void main(String[] args) {
	
	Coin c1 = new Dime();
	System.out.println("test 1: "+c1.toValue());
	
	Coin c2 = new CanadianDime();
	System.out.println("test 2: "+c2.toValue());
	
	Dime c3 = (Dime) c2;
	System.out.println("test 3: "+c3.toValue());
	
    }
    
}

abstract class Coin { 
    private int value;
    public int toValue() { return value;}
    public Coin(int value) { this.value=value;}
}

class Dime extends Coin {
    public Dime() {super(10);}
    protected Dime(int value) {super(6);}
}

class CanadianDime extends Dime {
    public CanadianDime() {super(6);}
}

class Penny extends Coin {
    public Penny() {super(1);}
}

/* output: 
   test 1: 10
   test 2: 6
   test 3: 6
*/