Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    int* ptr1 = arr ;
    int* ptr2 = arr + k ;

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

    while (ptr2 <= arr + n - 1){
        sum = sum + *ptr2 - *ptr1 ;
        ptr1++ ;
        ptr2++ ;

        printf("%d ",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