Sliding Window Sum

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    int curr_sum = 0;
    for ( size_t i = 0; i < k; ++i )
    {
        curr_sum += arr[i];
    }

    printf("%d ", curr_sum);

    for ( size_t i = k; i < n; ++i )  
    {
        curr_sum = curr_sum - arr[i - k] + arr [i];
        printf("%d ", curr_sum);
    }
    printf("\n");

}

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;
}