Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    int * nums = arr;

    while( n >= k){
        int sum = 0;
        for(int i = 0; i<k; i++){
            sum += nums[i];
        }
        printf("%d ", sum);

        nums += 1;
        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