#include<iostream>

using namespace std;

const int ArSize = 8;

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

int main() {

    int cookies[ArSize]{ 1,2,4,8,16,32,64,128 };

    int sum = sum_arr(cookies, ArSize);

    cout << "Total cookies eaten:" << sum << "\n";

    return 0;

}

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

    int total = 0;

    for (int i = 0; i < n; i++)

        total = total + arr[i];

    return total;

}