Sliding Window Sum

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    unsigned char i,j=0;
    
    while(k <= n){
       int sum =0;
        for(i=j; i<k;i++){
            sum = sum + arr[i];
        }
        printf("%d ",sum);
        j++;
        k++;

    }
}

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;
}