#include <iostream>

#include <string>

#include <chrono>

#include <thread>

#include <ctime>

void test_tic_toc_in_second()

{

std::cout << "\n# test_tic_toc_in_second\n";

std::time_t time_start(std::time(nullptr));

std::this_thread::sleep_for(std::chrono::milliseconds(233));

std::cout << "elapsed " << std::difftime(std::time(nullptr), time_start) << " seconds\n";

}

void test_tic_toc_in_nanosecond()

{

std::cout << "\n# test_tic_toc_in_nanosecond\n";

auto t_start = std::chrono::high_resolution_clock::now();

std::this_thread::sleep_for(std::chrono::milliseconds(233));

auto t_end = std::chrono::high_resolution_clock::now();

double t_duration = std::chrono::duration_cast<std::chrono::nanoseconds>(t_end-t_start).count() / 1e9;

std::cout << "elapsed " << t_duration << " seconds\n";

}

// g++ draft_ctime.cpp -std=c++11 -o tbd00.exe

int main(int argc, char const *argv[])

{

std::cout << "draft_ctime.cpp\n";

test_tic_toc_in_second();

test_tic_toc_in_nanosecond();

return 0;

}