#include <stdio.h>

struct point {
  int x;
  int y;
};

struct point get_point(void *point_array, int index) {
  struct point s;
  s = ((struct point *)point_array)[index];
  return s;
}

int main() {
  struct point a[] = { {0, 1}, {1, 2}, {2, 3}, {3, 4}, {4, 5} }, s;
  s = get_point(a, 3);
  printf("%d, %d\n", s.x, s.y);
  return 0;
}
/* end */

3, 4