// Timer.h

#ifndef TIMER_H

#define TIMER_H

#include

#include

#include

using namespace std;

class Timer {

public:

Timer();

void start() throw (runtime_error);

void stop() throw (logic_error);

double getElapsedTime() const throw (logic_error);

private:

clock_t beginTime;

clock_t duration;

bool timerWasStarted;

};

#endif // ifndef TIMER_H

I have this header file. Could you help me implement all the function?