void foo(int arr2[5], int* x2_ptr) {
         x2_ptr = &arr2[4];
         cout << *x2_ptr << endl;
         return;
    }

    int main() {
        int arr[] = {1, 2, 3, 4, 5};
        int x = 9;
        int* x_ptr = &x;
        foo(arr, x_ptr);
        cout << *x_ptr << endl;
        return 0;
    }