Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    if(k>n) return; ///return from function if limit is greater than array size

    int window_sum = 0;
    for(int i = 0; i<k;i++){
        window_sum += arr[i]; ///calculating the sum of first window
    }
    printf("%d ", window_sum); 

    for(int i = k; i<n; i++){
        window_sum += arr[i];  //adding value of next element to the sum
        window_sum -= arr[i-k]; // substracting first element from previous window to get actual sum of next window
        printf("%d ", window_sum);
    }
}

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