sum_test.cpp

#include<iostream>
#include<chrono>
#include<random>

template<std::size_t N>int sum(int const(&ar)[N])
{
	int ret{};
	for (int const& x : ar)
		ret += x;
	return ret;
}

int main()
{
	std::mt19937 mt{std::random_device()()};
	std::uniform_int_distribution<int> uni(0, 10);
	int ar[0x1000];
	for (int& x : ar)
		x = uni(mt);
	auto begin = std::chrono::system_clock::now();
	int s = sum(ar);
	auto end = std::chrono::system_clock::now();
	std::cout << std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin).count() << std::endl;
	std::cout << s << std::endl;
}