//  Whilesum.java  (c) 2004 Kari Laitinen

//  http://www.naturalprogramming.com

//  2004-10-10  File created.
//  2004-12-19  Last modification.

import java.util.* ;

class Whilesum
{
   public static void main( String[] not_in_use )
   {
      Scanner keyboard = new Scanner( System.in ) ;

      int  integer_from_keyboard   =  -1 ;
      int  sum_of_integers         =   0 ;

      System.out.print( "\n This program calculates the sum of the integers"
                      + "\n you type in from the keyboard. By entering a"
                      + "\n zero you can terminate the program. \n\n" ) ;

      while ( integer_from_keyboard  !=  0 )
      {
         System.out.printf( "  Current sum: %8d    Enter an integer: ",
                         +  sum_of_integers  ) ;

         integer_from_keyboard  =  keyboard.nextInt() ;

         sum_of_integers  =  sum_of_integers + integer_from_keyboard ;
      }
   }
}