// a small program to make change, based on an enum called Coin
// changing Coin can make this program behave in different ways

import java.util.Scanner;

class MakeChange {
	public static void main(String[] args) {

		// make an array of the coins
		Coin[] coins = Coin.values();

		// Scanner to listen to keyboard
		Scanner scanner = new Scanner(System.in);

		// what is the basic unit called?
		String unitName = Coin.getUnitName();

		// infinite loop!
		while (true) {

			// get input from user, quit on 0
			System.out.print("Enter number of " +unitName + ", or 0 to quit: ");
			int units = scanner.nextInt();
			if (units <= 0) break;

			// start the report
			System.out.println(units + " " +unitName+ " consists of:");

			// go through each of the coins in reverse order
			for (int i=coins.length-1; i>=0; i--) {

				// calculate how many coins there are of this value, remove them from units
				int value = coins[i].getValue();
				int numCoins = units / value;
				units -= (numCoins * value);

				// print
				System.out.println("\t" + coins[i] +" coins: " +numCoins);
			}
		}

		// outta here!
		System.out.println("Good bye!");
	}
}