Sliding Window Sum

Code

#include <stdio.h>

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

    for(int j=1; j<=n-k; j++){
    sum=sum-arr[j-1]+arr[j+k-1];
    printf("%d ", 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