/* (程序头部注释开始)

* 程序的版权和版本声明部分

* Copyright (c) 2011, 烟台大学计算机学院学生 

* All rights reserved.

* 文件名称：        利用多文件组织项目                   

* 作    者：          李霄汉                    

* 完成日期：     2011    年   3    月    12    日

* 版 本 号：          

* 对任务及求解方法的描述部分

* 输入描述： 

* 问题描述： 

* 程序输出： 

* 程序头部的注释结束

mytime.h

#include <iostream>
 
using namespace std;
 
class Time 
{
public:
    
    void set_time();  
    void show_time();
    
    void add_a_sec();
    void add_a_minute();
    void add_an_hour();
 
    void add_seconds(int);
    void add_minutes(int)；
    void add_hours(int);
private:
    
    bool is_time( int, int, int);
    
    int hour;  
    int minute;
    int sec;
};
 
 

main.cpp

#include <iostream>
 
#include "mytime.h"
 
int main()
{
    Time t1;
    
    Time&t2 = t1;
    
    t1.set_time();
    t2.show_time();
    
    t1.add_a_sec();
    t1.add_a_minute();
    t1.add_an_hour();
 
    t1.add_seconds(30);
    t1.add_minutes(30);
    t1.add_hours(30);
 
    system("PAUSE");
 
    return 0;
}
mytime.cpp
#include <iostream>
 
#include "mytime.h"
 
void Time::set_time()
{
    char c1, c2;
    
    cout << "请输入时间（格式hh:mm:ss）";
    
    while(1)
    {
       cin >> hour >> c1 >> minute >> c2 >> sec;
       
       if(c1 != ':' || c2 != ':')
           
           cout << "格式不正确，请重新输入" << endl;
       
       else if( !is_time ( hour, minute, sec ) )
           
           cout << "时间非法，请重新输入" << endl;
       
       else
           
           break;
    }
}
 
void Time::show_time()
{
    cout << hour << ":" << minute << ":" << sec << endl;
}
 
bool Time::is_time(int h, int m, int s)
{
    if( h < 0 || h > 24 || m < 0 || m > 60 || s < 0 || s > 60)
       
       return false;
    
    return true;
}
 
void Time::add_a_sec()
{
    if ( sec < 59 )
       
       sec++;
    
    else
    {
       minute++;
       
       if( minute == 60)
       {
           hour++;
           
           minute = 0;
           
           if (hour == 24)
           {
              hour = 0;
              
              minute = 0;
              
              sec = 0;
           }
       }
       
       sec = 0;
    }
    
    cout << hour << ":" << minute << ":" << sec << endl;
}
 
void Time::add_a_minute()
{
    
    if (sec == 0)
    {
       sec = 59;
    }
    
    else if ( minute == 59 )
    {
       
       hour++;
       
       if(hour == 24)
       {
           hour = 0;
       }
       
       minute = 0;
    }
    else 
    {
       minute ++;
       
       sec--;
    }
    
    cout << hour << ":" << minute << ":" << sec <<endl;
}
void Time::add_an_hour()
{
    
    if ( minute == 0 )
    {
       minute = 59;
    }
    else if (hour == 24 )
    {
       hour = 0;
    }
    else
    {
       minute--;
       
       hour++;
    }   
    
    cout << hour << ":" << minute << ":" << sec << endl;
}
void Time::add_seconds(int n)
{
 
    sec = sec + n;
 
    if(sec > 60)
    {
       minute = minute + sec / 60;
 
       sec = sec % 60 ;
 
       if (minute > 60 )
       {
           hour = hour + minute / 60;
 
           minute = minute % 60;
 
           if ( hour > 24)
 
              hour = hour % 24;
       }
    }
 
    cout << hour << ":" << minute << ":" << sec << endl;
}
void Time::add_minutes(int n)
{
    minute = minute + n;
 
    if (minute > 60)
    {
       hour = hour + minute / 60;
 
       minute = minute % 60;
 
       if ( hour > 24 )
 
           hour = hour % 24;
    }
    cout << hour << ":" << minute << ":" << sec << endl;
}
void Time::add_hours (int n)
{
    hour = hour + n;
 
    if (hour > 24)
    {
       hour = hour % 24;
    }
    cout << hour << ":" << minute << ":" << sec << endl;
使用VS2008：