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

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

double calcAverage(int grades[], int numGrades);

int main ()
{
   const int MAX_STUDENTS = 100;
   const int PASS_LEVEL = 70;
   int grades[MAX_STUDENTS];
   int numGrades = 0;

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

   printf("the number of grades is %d\n", numGrades);

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

      if (grades[i] >= PASS_LEVEL) {
         printf("Passing!!\n");
      }
      else {
         printf("you're a loser\n");
         printf("and you smell bad\n");
      }
   }

   double average = calcAverage(grades, numGrades);
   printf("the average is %f\n", average);

   return 0;
}

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

   FILE *fptr;
   fptr = fopen("grades.txt", "r");

   if (fptr == NULL) {
      printf("you screwed up!\n");
      exit(-42);
   }
   else {
      printf("yeah!!\n");
      
      int grade;
      char buf[BUFSIZ];

      while(fgets(buf, sizeof(buf), fptr)) {
//not part of the averager logic
printf("%s", buf);
char *s = (char *) malloc(strlen(buf));
strcpy(s, buf);
printf("hey! %s", s);

         grade = atoi(buf);
         grades[*numGrades] = grade;
         (*numGrades)++;
      }
   }
}

double calcAverage(int grades[], int numGrades)
{
   int total = 0;
   
   for (int i = 0; i < numGrades; i++)
      total = total + grades[i];

   return total / (double) numGrades;
}