#include <cstdio>

int main(void)
  {
  int a[] = {1,2,3,4,5};
  const int n = sizeof a / sizeof (int);

  for(size_t q = n-1; q != ~size_t(); --q)
    printf("%d ", a[q]);

  return 0;
  }

5 4 3 2 1