Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    int sum = 0;
    int start = 0;
    int end = k;
    for(int i = 0; i < (n - k)+1; i++){
        for(int j = start; j < end; j++){
            sum += arr[j];
        }
        printf("%d ",sum);
        sum = 0;
        start++;
        end++;
    }
}

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;
}