Sliding Window Sum

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    int* it1 = arr;
    int* it2;
    while ((it1 + k - 1) <= &arr[n - 1])
    {
        int sum = 0;
        it2 = it1 + (k - 1);
        for (int i = 0; i < k; i++)
        {
            sum += *it2;
            it2--;
        }
        it1++;
        printf("%d ", sum);
    }



}

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

    sliding_window_sum(arr, n, k);
    return 0;
}