50. Reverse an Array Using Only Pointers

#include <stdio.h>

void reverse_array(int *ptr, int n) // 1 2 3 4 5
{
    int *left = ptr;
    int *right = ptr + n - 1;
    int temp;

    while (left < right)
    {
        temp = *right;

        *right = *left ;
        *left = temp;

        right--;
        left++;
    }
}

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;
}