enum

// enum is just like struct key word
enum week{sunday, monday, tuesday, wednesday, thirsday, friday, saturday, }; // extra comma in the end, but it is not necessary

int main(int argc, char* argv[])
{
	cout<<sunday<<endl;
	cout<<monday<<endl;
	// cpp style
	week weekday;
//	weekday = 4;// fail,can't convert from 'int' to 'week'
	weekday = (week)4;// OK
	weekday = static_cast<week>(4);// OK

	int a = weekday;// OK, it is right to convert from 'week' to 'int'
	
	// c style
	enum week weekday_1 = monday;// enum is just like struct between c and cpp
	
	return 0;
}