TEST

#include<iostream>
#include<chrono>

class Timer {
    using clock_t = std::chrono::high_resolution_clock;
    using microseconds = std::chrono::microseconds;
public:
    Timer() : start_t(clock_t::now()) {}
    ~Timer() {
        const auto finish = clock_t::now();
        const auto us = std::chrono::duration_cast<microseconds> (finish - start_t).count();
        std::cout << us << " us" << std::endl;
    }
private:
    const clock_t::time_point start_t;
};

int main () {
    for (int i = 0; i < 1000000; ++i)
        std::cout << i << std::endl;
    Timer t;
        int b = 0;
        b = 2 + 2;
        std::cout << b;
        std::cout << "Ver.1";
}