第四周实验报告（四）

class Time
{
public:
void set_time( );
void show_time( );
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;
};

#include <iostream>

#include "ssss.h"

using namespace std;

int main( )
{
int h,m,s;
Time t1;
Time &t2=t1;
t1.set_time( );
cout << "需要增加的秒数" << endl;

cin >> s;

t1.add_seconds(s);

cout << "需要增加的分钟数" << endl;

cin >> m;

t1.add_minutes(m);

cout << "需要增加的小时数" << endl;

cin >> h;

t1.add_hours(h);

t2.show_time();

t2.show_time( );

system("pause");
return 0;
}

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_seconds(int n)
{
sec = sec + n;

while(sec >= 60)
{
sec = sec - 60;
minute++;
}
}
void Time::add_minutes(int n)
{
minute = minute + n;

while(minute >= 60)
{
minute = minute - 60;
hour++;
}
}
void Time::add_hours(int n)
{
hour = hour + n;
}