50. Reverse an Array Using Only Pointers

#include <stdio.h>

void reverse_array(int *ptr, int n) {
    int *lastptr= ptr+n-1;
    int temp = 0;
    // Your logic here
    for(int i=0;i<(n/2);i++){
        temp = *(ptr+n-i-1);
        *(ptr+n-i-1) = *(lastptr-n+i+1);
        *(lastptr-n+i+1) = temp;
    } 
}

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;
}