#include <stdio.h>
#include <stdlib.h>

double getAverage(int nums[], int numNums);

void getGrades(char fName[], int grades[], int *numGrades);

int main() {

   const int MAX_GRADES = 100;
   int grades[MAX_GRADES];
   int numGrades = 0;

   getGrades("grades.txt",grades,&numGrades);

   for (int i = 0; i < numGrades; i++) {
      printf("i - %d  grade - %d\n", i , grades[i]);
   } 

   printf("The average is %g\n", getAverage(grades, numGrades));
   
   if (getAverage(grades, numGrades) > 90.0)
      printf("passed");
   else
      printf("failed");

   printf("Hello World! again\n");

}

void getGrades(char fName[], int grades[], int *numGrades)
{
   FILE *fptr;

   fptr = fopen(fName, "r"); //the r is for read

   if (fptr == NULL)  {
      printf("hey you screwd up!\n");
      exit(-1);
   }
   else {
      printf("file open\n");
      
      int grade = 0;
      
      char buf[BUFSIZ];

      //while (!feof(fptr)) { ///NOOO!!!
      while (fgets(buf, sizeof(buf), fptr)) {
         grade = atoi(buf);
         grades[*numGrades] = grade;
         (*numGrades)++;
printf("grad - %d\n", grade);
      }
   }
}

double getAverage(int nums[], int numNums)
{
   int total = 0;

   for (int i = 0; i < numNums; i++) {
      total = total + nums[i];
   }

   double average = total / (double)numNums;

   return average;
}