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

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

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

int main(int argc, char *argv[])
{

   const int MAX_STUDENTS = 100;
   const int PASS_LEVEL = 70;
   int grades[MAX_STUDENTS];
   int numGrades = 0;

   getGrades(argv[1], grades, &numGrades);

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

      if (grades[i] >= PASS_LEVEL)
         printf("passing\n");
      else
         printf("failing\n");
   }

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

   printf("Hello everyone!\n");

   return 0;
}

//documentation goes here
double calcAverage(int grades[], int numGrades)
{
   double average;  
   int total = 0;

   for (int i = 0; i < numGrades; i++)
      total = total + grades[i];

   average = total / (double)numGrades;

   return average;
}
     
void getGrades(char fName[], int grades[], int *numGrades)
{
   FILE *fptr;
   fptr = fopen(fName, "r");  //the r is for read

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

      while (fgets(buf,sizeof(buf),fptr)) {
char *s = (char *) malloc(strlen(buf));
s = strcpy(s,buf);
printf("hey! %s", s);

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