Sliding Window Sum

Add next and remove previous element from  current sum

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    int i = 0, sum = 0;
    while(i < k){
        sum += arr[i];
        i++;
    }

    printf("%d ", sum);
    i = 1;
    int t = i+k;
    while((t)<=n){
        sum += arr[t-1];
        sum -= arr[i-1];
        printf("%d", sum);
        if(t < n)   putchar(' ');
        i++;        
        t = i+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;
}

Solving Approach