Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    int size = 1 + n - k;
    int sum;
    for (int i = 0; i < size; i++)
    {
        sum = 0;
        for (int j = i; j < i + k; j++)
        {
            sum += arr[j];
        }
        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