//  Meanvalue.java  (c) 2004 Kari Laitinen

//  http://www.naturalprogramming.com

//  2004-10-09  File created.
//  2004-12-19  Last modification.

import java.util.* ;

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

      int   integer_from_keyboard     =  0 ;
      int   number_of_integers_given  = -1 ;
      float mean_value                =  0 ;
      int   sum_of_integers           =  0 ;

      System.out.print( "\n This program calculates the mean value of"
                     +  "\n the integers you enter from the keyboard."
                     +  "\n Please, start entering numbers. The program"
                     +  "\n stops when you enter a zero. \n\n" ) ;

      do
      {
         System.out.print( "   Enter an integer: " ) ;
         integer_from_keyboard  =  keyboard.nextInt();

         number_of_integers_given  ++  ;
         sum_of_integers  =  sum_of_integers + integer_from_keyboard ;
      }
        while  ( integer_from_keyboard  !=  0 ) ;

      if ( number_of_integers_given  >  0 )
      {
         mean_value  =  (float) sum_of_integers /
                        (float) number_of_integers_given ;
      }

      System.out.print( "\n The mean value is: " + mean_value + " \n" ) ;
   }
}