Dont kNow Where this is going wrong??

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

enum SearchResult {FOUND, NOT_FOUND};

SearchResult binarySearch(int array[], int key, int low, int high,  int *comparisons);
void fill_array(int array[], int sizeOfData);

const int RANGE = 200; // random data used in range 0-199

int main()
  {
     const int arraySize = 100;
     int a[arraySize];
     FILE *resultsFile;
     resultsFile = fopen("bsrch.dat", "w");  // open the file lsrrch.dat for writing ("w")

     if (resultsFile != NULL)      // file successfully opened
      {
         // seed the random number generator so it gives different
       // random numbers each time
       srand ( time (0) );


       // Table headings
       printf ("Found\t Data Size\t Comparisons Needed\n"  );
                        //\t puts in a tab character, \n a new line
       fprintf (resultsFile, "Data Size\t Comparisons Needed\n"  );

       fill_array(a, arraySize);
       // Generate table for data of different sizes
       // giving number of comparisons each time

       for (int datasize = 1; datasize <= arraySize; datasize = datasize + 1)
	{
	  int count = 0;  // number of comparisons this time
	  SearchResult result; // result of this search
	  int searchKey = rand() % RANGE;


	  result = binarySearch(a, searchKey, 0, datasize -1, &count);
        if (result == FOUND)
             printf("KEY FOUND \t");
        else
             printf("NOT FOUND \t");

	  // print results in a table
          printf("%d  \t\t\t  %d\n", datasize, count);
          fprintf(resultsFile, "%d  \t\t\t  %d\n", datasize, count);
 	}