arrReversePointer

#include<iostream>

int main()
{
    const int arrsize{ 6 };
    int arr[arrsize]{ 5,9,8,6,3,10 };
    int* parr{ arr };

    int change{ 0 };
    for (int head{ 0 }, tail{ arrsize - 1 }; head < tail ; ++head, --tail)
    {
        change = *(parr + head);
        *(parr + head) = *(parr + tail);
        *(parr + tail) = change;
    }

    for (int i = 0; i < arrsize; i++)
    {
        std::cout << *(arr + i) << ' ';
    }
}