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#include <iostream>

using namespace std;

int total (int arr_len, int *arr)
{
    if ( arr_len == 0 )
        return 0;
    return *arr + total(--arr_len, arr + 1);
}

int main ()
{
    int arr[] = {1,2,3,4,5,6,7,8,9};
    int arr_len = sizeof(arr) / sizeof(arr[0]);
    cout << total(arr_len, arr) << endl;
    return 0;
}