Sliding Window Sum

Code

#include <stdio.h>

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

    printf("%d ", res);
}

void sliding_window_sum(int arr[], int n, int k) {
    int start = 0;
    while (start + k <= n) {
        sum(arr, start, start + k);
        start++;
    }
}

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