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

void printArray(int * array, int size)
{
  int arrayIndex;
  for (arrayIndex = 0; arrayIndex < size; arrayIndex ++)
    {
      printf("%d\n", array[arrayIndex]);
    }
}

int main(int argc, char * argv[])
{
  FILE * fhd;
  int * intArray;
  int numElem;
  int elemValue;
  int sum;
  int arrayIndex;
  char fileName[1024];
  fhd = NULL;
  do 
    {
      printf("please enter the file name : ");
      scanf("%s", fileName);
      fileName[1023] = '\0';
      fhd = fopen(fileName, "r");
    } while (fhd == NULL);
  fscanf(fhd, "%d", & numElem);
  printf("%d elements\n", numElem);
  intArray = (int*) malloc(numElem * sizeof(int));
  for (arrayIndex = 0; arrayIndex < numElem; arrayIndex ++)
    {
      intArray[arrayIndex] = arrayIndex * 7;
    }
  printArray(intArray, numElem);
  sum = 0;
  while (! feof(fhd)) /* not the end of the file yet */
    {
      fscanf(fhd, "%d", & elemValue);
      sum += elemValue;
      /* printf("sum += %d => %d\n", elemValue, sum); */
    }
  fclose(fhd);
  printf("sum = %d\n", sum);
  return 0;
}