Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    // int slide_start = 0;
    // while((slide_start+k) <= n)
    // {
    //     int sum=0;
    //     for(int i=slide_start;i<(slide_start+k);i++)
    //     {
    //         sum = sum + arr[i];
    //     }
    //     printf("%d ",sum);
        
    //     slide_start++;
    // }
        if (k > n || k <= 0) return;

    int sum = 0;
    for (int i = 0; i < k; i++) sum += arr[i];   // first window
    printf("%d", sum);

    for (int i = k; i < n; i++) {
        sum += arr[i] - arr[i-k];  // update by removing outgoing and adding incoming
        printf(" %d", sum);
    }
    printf("\n");
}

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