int summ (const int* arr, int arrSize)
{
    int result = 0;
    for(int i = 0; i < arrSize; i++)
        result += arr[i];
    return result;
}

int main()
{
    int arr [] = {4, 5, 8, 3, 1};
    cout << summ(arr, sizeof(arr) / sizeof(arr[0]));
    return 0;
}