/* Program: rolled.c

This program finds the smallest and average
values of a list of numbers entered by the user.
The end of the list is indicated by entering a 0.
This program was developed using the loop unrolling process.
*/

#include <stdio.h>
#include "genlib.h"
#include "simpio.h"
#define SENTINNEL 0

main() {
   int value, total, minimum, items ;
   double average ;

   printf("Signal end of list with a 0.\n") ;

   /* Get first number */
   printf(" ? ") ;
   total = 0 ;
   items  = 0 ;
   value = GetInteger() ;

   /* Check if the first number is zero */
   if (value == 0) {
      printf("No items were entered.\n") ;
   } else {

      /* Initializing variables */
      total = value ;
      items = 1 ;
      minimum = value ;
      printf(" ? ") ;
      value = GetInteger() ;

      while (value != SENTINNEL) {
 	 total += value ;
	 items++ ;
	 if (value < minimum) minimum = value ;
	 printf(" ? ") ;
	 value = GetInteger() ;
      }

      /* Report the results */
      printf("Total value: %d.\n", total) ;
      printf("Smallest value: %d.\n", minimum) ;
      average = ((double) total) / ((double) items) ;
      printf("Average value: %f.\n", average) ;
   }
}