#include<iostream>

using namespace std;

///////////

#ifndef __MyTimer_H__

#define __MyTimer_H__

#include <windows.h>

class MyTimer{

private:

    int _freq;

    LARGE_INTEGER _begin;

    LARGE_INTEGER _end;

public:

    long costTime;            // 花费的时间(精确到微秒)

public:

    MyTimer(){

        LARGE_INTEGER tmp;

        QueryPerformanceFrequency(&tmp);

        _freq = tmp.QuadPart;

        costTime = 0;

    }

    void Start(){            // 开始计时

        QueryPerformanceCounter(&_begin);

    }

    void End(){                // 结束计时

        QueryPerformanceCounter(&_end);

        costTime = (long)((_end.QuadPart - _begin.QuadPart) * 1000000 / _freq);

    }

    void Reset(){            // 计时清0

        costTime = 0;

    }

};

#endif

/////////////////

int main(){

	MyTimer mt;

	mt.Start();

	int i;

	int sum=0;

	for(i=0;i<12345678;i++){

		sum=sum+i;

	}

	mt.End();

	cout<<"Total cost time:"<<mt.costTime<< " us" << endl;

	return 0;

}