【C++】【STL】利用chromo來測量程序運行時間與日誌時間打印精確到微秒

直接上代碼吧，沒啥好說的。頭疼。

#include <iostream>
#include <string>
#include <ctime>
#include <sstream>
#include <iomanip>
#include <thread>
#include <chrono>

using namespace std;

class LogTime {
public:
	LogTime() {}
	~LogTime() {}
	inline void Start() { this->start = std::chrono::system_clock::now(); }
	inline void End() { this->end = std::chrono::system_clock::now(); }

	std::string GetRunTime() {
		auto us_duration = std::chrono::duration_cast<std::chrono::microseconds>(this->end - this->start);
		auto ms_duration = std::chrono::duration_cast<std::chrono::milliseconds>(this->end - this->start);
		unsigned long ms = ms_duration.count();
		unsigned long us = us_duration.count();
		std::stringstream ss;
		ss << ms << " ms," << us << " us .";
		return ss.str();
	}

	std::string Now() {
		auto now = std::chrono::system_clock::now();
		auto m = now.time_since_epoch();
		auto diff = std::chrono::duration_cast<std::chrono::microseconds>(m).count(); //當前時間顯示到微秒
		auto const ms = diff % 1000000;
		//auto diff = std::chrono::duration_cast<std::chrono::milliseconds>(m).count(); //當前時間顯示到毫秒
		//auto const ms = diff % 1000;

		std::stringstream ss;
		std::time_t t = std::chrono::system_clock::to_time_t(now);
		ss << std::put_time(std::localtime(&t), "%Y-%m-%d %H.%M.%S") << "." << ms;
		return ss.str();
	}
private:
	std::chrono::system_clock::time_point start;
	std::chrono::system_clock::time_point end;
};