/*********************************************************************
 * Author:        Eric Heim
 * Date Created:  6/9/2011
 * Course:        CS0007
 * Description:   Shows the use of an sentinel value by taking in
 *                amounts sold for a number of days and displaying their
 *                sum and average when a sentinel value is entered
 *********************************************************************/
import java.text.DecimalFormat;
import java.util.Scanner;

public class SentinelValue {
	public static void main(String[] args) {
		int days = -1;
		double dayAmount = 0.0, total = 0.0;
		
		Scanner keyboard = new Scanner(System.in);
		DecimalFormat formatter = new DecimalFormat("0.00");
		
		while(dayAmount != -1.0) {
			days++;
			total += dayAmount;
			System.out.print("Total amount sold for day " + days + " (-1 to quit): ");
			dayAmount = keyboard.nextDouble();
		}
		
		System.out.println("Total Sales: " + formatter.format(total));
		System.out.println("Average Sales Per Day: " + 
				           formatter.format(total/days));
	}
}