Sliding Window Sum

Code

#include <stdio.h>

int window_sum(int arr[], int start, int end)
{
    int sum = 0;
    for(int i=start; i<=end; i++)
    {
        sum+=arr[i];
    }
    return sum;
}

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    if(n < k)
    {
        return;
    }

    int current_window_sum = window_sum(arr, 0, k-1);
    printf("%d ", current_window_sum);

    for(int i=k; i<n; i++)
    {
        current_window_sum += arr[i] - arr[i-k];
        printf("%d ", current_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