chrono_epoch.cpp

#include <chrono>
#include <iostream>

int main() {
	struct timespec n;
	for (int i = 0; i < 20; ++i) {
		auto now = std::chrono::system_clock::now();
		auto now_ns = std::chrono::time_point_cast<std::chrono::nanoseconds>(now);
		std::cout << "current nano: " << now_ns.time_since_epoch().count() << std::endl;
	}

	return 0;
}