/**************************************************
 * sum-array.c
 *
 * Michael Siff - Computer Architecture - Fall 2007
 *
 * compute the sum of an array of integers
 *
 **************************************************/
  
#include <stdio.h>


#define MAX_ARRAY_SIZE 10


int sumArray(int a[], int n) {
  int i = 0;
  int sum = 0;
  for (i = 0; i < n; i++) {
    sum += a[i];
  }
  return sum;
}


int main() {
  int x = 0;
  int myArray[MAX_ARRAY_SIZE];
  int nElements = 0;

  while (x >= 0 && nElements < MAX_ARRAY_SIZE) {
    printf("Enter a number or negative to stop: ");
    scanf("%d", &x); /* read in an integer and store it in x */
    if (x >= 0) {
      myArray[nElements] = x;
      nElements++;
    }
  }

  printf("There are %d elements and their sum is: %d\n",
	 nElements, sumArray(myArray, nElements));

  return 0;
}