T3

#include <iostream>

using namespace std;

class Time
{
public :
	void set_time ();
	void show_time ();
	inline void add_a_sec ();
    inline void add_a_minute();
    inline void add_an_hour ();
	void add_seconds (int  x);
    void add_minutes (int  y);
	void add_hours (int z );
private :
	bool is_time (int ,int ,int);
	int hour;
	int minute;
	int sec;
};

int main()
{
	int x,y,z;

	Time t1;

	Time &t2=t1;

	t1.set_time ();

	t1.add_a_sec ();

	t1.add_a_minute();

	t1. add_an_hour ();

    t2.show_time();

	cout << "请输入要增加的时分秒："<<endl;

	cin>>x>>y>>z;

	t1.add_seconds (  z );

    t1.add_minutes (  y);

    t1.add_hours (  x);

    t2.show_time();

	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 ;
}

inline void Time::add_a_sec ()
{
	sec++;
}

inline void Time::add_a_minute()
{
	minute++;
}

inline void Time::add_an_hour ()
{ 
	hour++;
}

void  Time::add_seconds (int  z)
{
	sec=sec+z;
	if (sec>60||sec==60)
	{
		minute=minute+(sec/60);

		sec=sec%60;
	}
}

void Time::add_minutes (int  y)
{
	minute=minute+y;
	if (minute>60 || minute==60)
	{
		hour=hour+minute/60;

		minute = minute % 60;
	}
}
void Time::add_hours (int x )
{
	hour=hour+x;
}