/*
 * Learning C with some easy code
 * Sum of Input
 */

#include <stdio.h>
#include <stdlib.h>
#define TRUE 1

int main() {
  int size = 1;
  int sum = 0;
  int pos = 0;
  int end_scan = 1;
  int* arr = malloc(size * sizeof(int));
  
  while(end_scan) {
    printf("(Type EOF to end) Enter a number: ");
    if (scanf("%d", &(arr[pos])) == EOF) {
      end_scan = 0;
    }
    if( arr[pos] == 0 ) {
      break;
    }
    size++;
    int* new_arr = realloc(arr, size * sizeof(int));
    arr = new_arr;
    pos++;
  }

  for (int i = 0; i < size; i++) {
    sum += arr[i];
  }

  free(arr);
  printf("Your sum is: %d\n", sum);

  return EXIT_SUCCESS;
}