static void Main(string[] args)
{
AA aa = new AA();
aa.IAAPrint();
BB bb = new BB();
bb.IAAPrint();
bb.IBBPrint();
IAA iaa = new AA(); //참조 가능
iaa.IAAPrint();
IBB ibb = bb as IBB;
ibb.IBBPrint();
CC cc = new CC();
cc.Print();
cc.IAAPrint();
cc.IBBPrint();
Super scc = cc as Super;
scc.Print();
IAA iaacc = cc as IAA;
iaacc.IAAPrint();
IBB ibbcc = cc as IBB;
ibbcc.IBBPrint();
}