public static void Main(string[] args)
{
DateClass p, q;
p = new DateClass(2004, 1, 1);
q = p;
p.addDay();
p.display();
q.display();
DateStruct m, n;
m = new DateStruct(2004, 1, 1);
n = m;
m.addDay();
m.display();
n.display();
Console.Read();
}