Method asSeconds

Lab_13/main1.cpp:44–47

			 << "SS: " << second << endl;
	}
	int asSeconds() const
	{
		return (3600 * hour + 60 * minute + second);
	}

	friend void operator<<(ostream &out, DayTime &h);
	friend void operator>>(istream &in, DayTime &h);