// CSE 142, Winter 2008, Marty Stepp
//
// This program demonstrates a "sentinel" value,
// a special value that signals the end of user input.
// Sentinel loops are an example of a fencepost problem.
//
// This version is modified to use a break statement.
// This would be considered bad style and shouldn't be used on your homework.
//
// We're showing it because it's something you'll see in other people's code,
// so it's useful to be aware of it and understand why it is bad to use it.

import java.util.*;

public class Sentinel3 {
	public static void main(String[] args) {
		Scanner console = new Scanner(System.in);
		int sum = 0;

		while (true) {
			// read first number (place first "post")
			System.out.print("Enter a number (-1 to quit): ");
			int number = console.nextInt();
			
			if (number < 0) {
				// stop this loop immediately (bad style, don't use on HW5)
				break;
			}

			// add number to sum (place a "wire")
			sum = sum + number;
		}
		
		System.out.println("The total was " + sum);
	}
}