import java.util.*;

public class uscoins
{
   public enum Coins
   {
      Penny (0.01), Nickel (0.05), Dime (0.10), Quarter (0.25),
      HalfDollar(0.50);
      
      private final double value;
      
      private Coins(double value)
      {
	 this.value = value;
      }
      
      public double getValue()
      {
	 return value;
      }
   }
   
   public static void main(String[] args)
   {
      // Out pocket is a vector rather than an array.
      Vector<Coins> pocket = new Vector<Coins>();
      int x, numCoins, randomCoin;
      // values() returns the enumeration as an array
      Coins[] definedCoins = Coins.values();
      double pocketValue = 0.0;
      
      // from 1 to 10 random coins in our pocket.
      numCoins = (int)(Math.random() * 10 + 1);
      System.out.printf("There are %d coins in our pocket.%n", numCoins);
      
      // add a random coin
      for (x = 0; x < numCoins; x++)
      {
	 randomCoin = (int)(Math.random() * definedCoins.length);
	 pocket.addElement(definedCoins[randomCoin]);
      }
      
      // Display the list of coins and calculate the pocket value
      System.out.println("Our pocket contains:\n" + pocket);
      for (Coins coin : pocket)
	pocketValue = pocketValue + coin.getValue();
      
      System.out.printf("%nPocket value is $%.2f.%n%n", pocketValue);
   }
}