static void AbstractDemo()
{
TRex trex = new TRex();
Triceratops triceratops = new Triceratops();
trex.EatFood();
trex.Move();
trex.Fights();
trex.Sleeps();
trex.SkinType();
trex.Teeth();
triceratops.EatFood();
triceratops.Move();
triceratops.Sleeps();
triceratops.SkinType();
triceratops.Teeth();
}
