Sliding Window Sum

Code

#include <stdio.h>

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

        // sum of window starting at index i
        for (int j = i; j < i + k; j++)
        {
            sum = sum + arr[j];
        }

        printf("%d", sum);
        if (i < n - k) printf(" ");
    }
}

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