Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {

    int no = n-k+1,start = 0,end,sum=0;
    for(int i=0;i<no;i++){
        sum = 0;
        for(int j=0;j<k;j++){
            sum += arr[start+j];
        }
        printf("%d",sum);
        start+=1;
        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