why dont we pass in &arr to function change
nt arr[3] = {1, 2, 3};
        double result = change(arr, 3);
        // Comment the above, and uncomment the below, to see
        // change only work on the 2nd and 3rd integers
        // double result = change(arr + 1, 2);
        printf("The array is now: ");
        for(int i = 0; i < 3; i++) {
                printf("%d ", arr[i]);
        }
        printf("\nAnd the average is %lf\n", result);