Sliding Window Sum

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // start of window
    int i = 0;
    // end of window
    int j = k - 1;
    while (j < n) {
        int total = 0;
        int index = i;
        while (index <= j) {
            total += arr[index];
            index++;
        }
        printf("%d ", total);
        i++;
        j++;
    }
}

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;
}