C++ 计算程序运行时间

 计算程序运行的时间

#include "stdafx.h"
#include 
#include 

using namespace std;

int main()
{
	clock_t start, finish;
	double  duration;
	start = clock();
	
	int cnt = 0;

	for (int i = 0; i < 17320; i++)
	{
		for (int j = 0; j < 17321; j++)
		{
			cnt++;
		}
	}

	finish = clock();
	duration = (finish - start) * 1.0 / CLOCKS_PER_SEC;

	cout