question2.c

int 
load_data(FILE *fp, t_data *ptr_data) {
  //read into array
  fread(&ptr_data->n, BINARY_N_LENGTH, 1, fp);

  //get n
  int n = extract_little((char *)&ptr_data->n, 0, BINARY_N_LENGTH);

  //allocate array
  ptr_data->array = malloc(sizeof(t_double) * n);

  //read into array
  fread(ptr_data->array, BINARY_DOUBLE_SIZE, n, fp);

  return n;
}