import java.util.Scanner;

public class ReadAndSum
{
    public static void main(String[] args)
    {
        final int SENTINEL = 0;

        Scanner input = new Scanner(System.in);
        int x;    // Next input number
        int sum;
        
        sum = 0;
        
        do
        {
            System.out.print("Enter an integer (ends if it is 0): ");
            x = input.nextInt();

            if ( x != SENTINEL )
                sum = sum + x;  // Add a legitimate input
        }
        while ( x != SENTINEL );
        
        System.out.println("Sum = " + sum);
    }
}