/*
 * Compute the average of the grades.
 * CISC105 07.11.05
 * average.3.c
 */

#include<stdio.h>
#define SENTINEL -1
#define MAXGRADES 200

int main() {
  int x = 200;
  float runningSum = 0;
  int grade = 0;
  int numGrades = 0;
  float average;
  int grades[MAXGRADES];
  int i;
  int aboveAvg = 0;

  printf("Enter a grade or %d to compute the average: ", SENTINEL);
  scanf("%d", &grade);
  
  while( grade != SENTINEL ) {
    grades[numGrades] = grade;
    runningSum += grade;
    numGrades++;
    printf("Enter a grade or %d to compute the average: ", SENTINEL);
    scanf("%d", &grade);
  }

  /* print the saved grades */
  for( i=0; i < numGrades; i++ ) {
    printf("%d\n", grades[i]);
  }

  if( numGrades > 0 ) {
    average = runningSum/numGrades;
    printf("The average of %d grades is %.2f\n", numGrades, average);
  }
  else {
    printf("No grades entered.");
    exit( 1 );
  }

  for ( i=0; i < numGrades; i++ ) {
    if( grades[i] > average ) {
      aboveAvg++;
    }
  }
  
  printf("%d grades are above average.\n", aboveAvg );

  return 0;
}