#ifndef TIME_H
#define TIME_H

class Time
{
public:
  Time();
  Time(int elapsetime);
  int getElapseTime();
  void setElapseTime(int elapsetime);
  int getHour();
  int getMinute();
  int getSecond();
  int setTime(int elapsetime);

  
private:
  int elapseTime;
};

#endif
#include "Time.h"
#include <cmath>
using namespace std;

Time::Time()
{
    elapseTime=555550;
}
Time::Time(int elapsetime)
{
    elapseTime=elapsetime;
}

int Time::getElapseTime()
{
    return elapseTime;
}

void Time::setElapseTime(int elapsetime)
{
    elapseTime=elapsetime;
}

int Time::getHour()
{
    int hour=elapseTime/3600;
    return hour;
}

int Time::getMinute()
{
    int minute=elapseTime%3600/60;
    return minute;
}

int Time::getSecond()
{
    int second=elapseTime%3600%60;
    return second;
}
#include<iostream>
#include<iomanip>
#include"Time.h"
using namespace std;

int main()
{
    cout<<"Enter elapseTime:";
    int elapseTime;
    cin>> elapseTime;
   
    Time :: Time(elapseTime);
   
    cout<<"The hour is:"<<Time.getHour()<<endl;
    cout<<"The minute is:"<<Time.getMinute()<<endl;
    cout<<"The second is:"<<Time.getSecond()<<endl;
}

你以前是学 Java/.Net 等语言的吧？

class Time
{
public:
    Time( unsigned elapsed_time=555550 ) : elapsed_time_(elapsed_time)
    {
    }
    operator unsigned() const
    {
        return elapsed_time_;
    }
    unsigned hour() const
    {
        return elapsed_time_/3600;
    }
    unsigned minute() const
    {
        return elapsed_time_%3600/60;
    }
    unsigned Time::second() const
    {
        return elapsed_time_%60;
    }

private:
    unsigned elapsed_time_;
};

#include <iostream>
using namespace std;

int main( void )
{
    cout << "Enter elapseTime: ";
    unsigned elapseTime;
    cin >> elapseTime;

    Time a( elapseTime );
    cout << "The hour   is:" << a.hour()   <<endl;
    cout << "The minute is:" << a.minute() <<endl;
    cout << "The second is:" << a.second() <<endl;
}

以前学的是c语言    这学期刚学c++，