50. Reverse an Array Using Only Pointers

#include <stdio.h>

void swap(int * p1,int * p2)
{
    *p1 ^= *p2;
    *p2 ^= *p1;
    *p1 ^= *p2;
}

void reverse_array(int *ptr, int n) {
    // Your logic here
    int left = 0 , right = n-1;
    while(left < right)
    {
        swap(ptr+left,ptr+right);
        left++;
        right--;
    }

}

int main() {
    int n;
    scanf("%d", &n);

    int arr[100];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    reverse_array(arr, n);

    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);
        if(i < n-1){
            printf(" ");
        }
    }

    return 0;
}