50. Reverse an Array Using Only Pointers

#include <stdio.h>

void reverse_array(int *ptr, int n) {
    int arr_2[n];
    int *ptr2 = arr_2;
    for (int i = 0; i<n; i++){
        *(ptr2 + i) = *(ptr + (n-i-1));
    }

    for (int i = 0; i<n ; i++){
        *(ptr+i) = *(ptr2 + i);
    }
}

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;
}