Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    if (k > n) {
        printf("Window size is larger than array size\n");
        return;
    }

    int windowSumArray[n - k + 1]; // Correct size

    for (int i = 0; i <= n - k; i++) {
        windowSumArray[i] = 0; // Initialize
        for (int j = 0; j < k; j++) {
            windowSumArray[i] += arr[i + j];
        }
    }

    for (int i = 0; i <= n - k; i++) {
        printf("%d ", windowSumArray[i]);
    }
    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