average.cpp

bool double_eq(const double a, const double b) {
    return std::fabs(a - b) < std::numeric_limits<double>::epsilon();
}

double average(const vector<int> &numbers) {
    int sum = std::accumulate(numbers.begin(), numbers.end(), 0);
    return sum / numbers.size();
}

int main() {
    vector<int> numbers = {0, 0, 0, 0, 0};
    assert(double_eq(average(numbers), 0));

    vector<int> numbers = {1, 0, 10, 0, 0};
    assert(double_eq(average(numbers), 2.2));
}