/*
A program which calculates the average of the grades.
Maiko Teramoto   Oct 21, 1999
*/

#include<stdio.h>
main()
{
   float grade ;
   float  average = 0.0 , sum = 0.0 ;
   int count = 0 ;

   printf( "Enter grades, one per line, or CTRL-D to end.\n" ) ;

  while ( scanf("%f" , &grade ) == 1 )
  { 
   if ( ( 0.0 <= grade ) && ( grade <= 100.0 ) )
   {
     sum += grade ;
     count ++ ;
   }
   else
    printf ( "Must be betwen 0 and 100; try again.\n" ) ;
  }
    average = sum / count ;

  printf( "Count = %d\n", count ) ;
  printf( "Average = %.2f\n", average ) ;
}