/** 
    Coin class

    @author A. Ozgelen 
*/

public class Coin {
    // constructor - default
    public Coin(){
	value = 25; 
	flip();
    }

    // constructor - overloaded
    public Coin(int value) {
	this.value = value ; 
	flip(); 
    } // end of c'tor
    
    // flip - randomly picks head or tail and assigns it to face
    public void flip() {
	face = (int) (Math.random() * 2); 
    }
    
    // accessor method to face
    public int getFace() { 
	return face; 
    }

    // accessor method to value
    public int getValue() {
	return value; 
    }

    
    public String toString() {
	String facename; 
	if(face == HEADS) {
	    facename = "heads"; 
	}
	else {
	    facename = "tails";
	}
	return (Integer.toString(value) + " cent coin, face: " + facename); 
    }

    // static constants 
    public static final int HEADS = 0 ; 
    public static final int TAILS = 1 ; 
    
    // data fields
    private int face ;    // heads or tails 
    private int value ;   // in cents

    // unit test
    public static void main (String[] args) {
	// instantiate one of each: quarter, dime, nickel, penny
	Coin quarter = new Coin(25); 
	Coin dime = new Coin(10); 
	Coin nickel = new Coin(5); 
	Coin penny = new Coin(1);

	// print each objects face and value using toString
	System.out.println(quarter.toString()); 
	System.out.println(dime.toString()); 
	System.out.println(nickel.toString()); 
	System.out.println(penny.toString()); 
	
	// test flip on each object 
	quarter.flip(); 
	dime.flip(); 
	nickel.flip(); 
	penny.flip();

	// print each objects face and value using getFace and getValue methods
	System.out.println("value:" + quarter.getValue() + ", face:" + quarter.getFace()); 
	System.out.println("value:" + dime.getValue() + ", face:" + dime.getFace()); 
	System.out.println("value:" + nickel.getValue() + ", face:" + nickel.getFace()); 
	System.out.println("value:" + penny.getValue() + ", face:" + penny.getFace()); 
    }
} // end of class Coin