#include <iostream>

const int ArSize = 8;

int sum_arr(int arr[], int n);

int main()
{
    using namespace std;
    int cookies[ArSize] = {1, 2, 4, 8, 16, 32, 64, 128};

    int sum = sum_arr(cookies, ArSize);
    cout << "Total cookies eaten: " << sum << "\n";
}

int sum_arr(int arr[], int n)
{
    int total = 0;
    for (int i = 0; i < n; i++)
    {
        total = total + arr[i];
    }
    return total;
}