Pointers with array is not working with - backward operator, why?

Question

#include <stdio.h>

int main() {
int a[5] = {22, 33, 44, 55, 66};
int *ptr = NULL;
int i;

ptr = a;
for (i = 4; i >=0; i--) {
printf("%d ", *(ptr - i));
}
}

showing address locations not array elements

Answer 1

As I mentioned before, use *(ptr + i) instead, since you want the locations that come after ptr, not before it.
https://code.sololearn.com/cuNfV70SCo5G/?ref=app

Answer 2

The issue is that ptr (and a) is a pointer to the beginning of the array, the first element. Decreasing this pointer by i means accessing elements that are out of the bounds of the array, i.e. random memory spaces with garbage values.
It should work with *(ptr + i) though.

Answer 3

what should I do to reverse print array elements

Answer 4

ty bro!