Sliding Window Sum

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
   int left = 0;
   int right = 0;
   int sum = 0;

   while(right < n)
   {
        sum += arr[right];

        //if window size becomes k 
        if(right - left + 1 == k)
        {
            printf("%d ", sum);
            sum -= arr[left];
            left++;
        }

        right++;
   }


}

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;
}