Array Arguments

Array parameters are handled somewhat differently than simple types.

Arrays are passed by "reference" not by "value".

Modifications to the array in a function will affect the original.

Example

void modarray ( int[] x ) {
  x[0] = 5;
}


int main (void) {
  int i;
  int[] x = {0, 1, 2, 3, 4};

  for (i = 0; i < 5; i++) {
   printf ("%d ", x[i]);
  }
  printf("\n");

  modarray (x);

  for (i = 0; i < 5; i++) {
   printf ("%d ", x[i]);
  }
  printf("\n");
  return 0;
}

Will produce the following output

0 1 2 3 4
5 1 2 3 4