Sliding Window Sum

Code

#include <stdio.h>

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

Solving Approach