std c++ 获取运行时间封装

c++11 的时间

名空间在std::chrono 里卖弄 using namespace std::chrono

1 使用std::chrono::system_clock

#include 
#include 
#include 
#include 
#include 
using namespace std::chrono;

#if 1
class c_time {
public:
	c_time() {}
	~c_time() {}
	inline void Start() { this->start = std::chrono::system_clock::now(); }
	inline void End() { this->end = std::chrono::system_clock::now(); }

	inline int64_t GetRunTime() {
		auto us_duration = std::chrono::duration_cast(this->end - this->start);
		//auto ms_duration = std::chrono::duration_cast(this->end - this->start);
		uint64_t ms = us_duration.count();
		return ms;
	}

	std::string Now() {
		auto now = std::chrono::system_clock::now();
		auto m = now.time_since_epoch();
		//auto diff = std::chrono::duration_cast(m).count(); //当前时间显示到微秒
		//auto const ms = diff % 1000000;
		auto diff = std::chrono::duration_cast(m).count(); //当前时间显示到毫秒
		auto const ms = diff % 1000;

		std::stringstream ss;
		std::time_t t = std::chrono::system_clock::to_time_t(now);
		ss