一个微妙级的时间计时框架

#include<iostream>
#include<chrono>
using namespace std;
using namespace chrono;
int main()
{
	auto start = system_clock::now();
	
	//do your work

	auto end = system_clock::now();
	auto duration = duration_cast<microseconds>(end - start);
	cout << (double)duration.count()*microseconds::period::num / microseconds::period::den<<endl;
	system("pause");
	return 0;
}

chrono introduction