Cортировка в файле

#include <stdio.h>
#include <stdlib.h>
 
#define MAX_LENGHT 255
 
enum FileResult {
  frOK,
  frOpenError,
  frReadError,
  frWriteError,
};
 
struct Car {
  char brand[MAX_LENGHT];
};
 
enum FileResult Load(char* file_name, struct Car** p_arr, int* p_size) {
         FILE* file;
  struct Car*  arr;
         int   size;
         int   i;
 
  if ((file = fopen(file_name, "r")) == NULL)
    return frOpenError;
 
  if (fscanf(file, "%d", &size) != 1)
    return frReadError;
 
  arr = (struct Car*)malloc(size * sizeof(struct Car));
 
  for (i = 0; i < size; ++i)
    if (fscanf(file, "%s", arr[i].brand) != 1)
      return frReadError;
 
  *p_arr  = arr;
  *p_size = size;
 
  return frOK;
}
 
enum FileResult Save(char* file_name, struct Car* arr, int size) {
  FILE* file;
  int   i;
 
  if ((file = fopen(file_name, "w")) == NULL)
    return frOpenError;
 
  if (fprintf(file, "%d\n", size) != 1)
      return frWriteError;
  
  for (i = 0; i < size; ++i)
    if (fprintf(file, "%s\n", arr[i].brand) != 1)
      return frWriteError;
 
  return frOK;
}
 
int Compare(void* left, void* right) {
  return strcmp(((struct Car*)left)->brand, ((struct Car*)right)->brand);
}
 
void Sort(struct Car* arr, int size) {
  qsort((void*)arr, size, size * sizeof(struct Car), Compare);
}
 
int main() {
  struct Car* arr                   = NULL;
         int  size                  = 0;
         char file_name[MAX_LENGHT] = "file_name.txt";
 
  if (Load(file_name, &arr, &size) != frOK)
    return EXIT_FAILURE;
 
  Sort(arr, size);
 
  if (Save(file_name, arr, size) != frOK)
    return EXIT_FAILURE;
 
  return EXIT_SUCCESS;
}

qsort((void*)arr, size, size * sizeof(struct Car), Compare);

qsort((void*)arr, size, sizeof(struct Car), Compare);