![1 Abstract Class There are some situations in which it is useful to define base classes that are never instantiated. Such classes are called abstract classes. - ppt download 1 Abstract Class There are some situations in which it is useful to define base classes that are never instantiated. Such classes are called abstract classes. - ppt download](https://images.slideplayer.com/23/6888289/slides/slide_3.jpg)
1 Abstract Class There are some situations in which it is useful to define base classes that are never instantiated. Such classes are called abstract classes. - ppt download
![1 Abstract Class There are some situations in which it is useful to define base classes that are never instantiated. Such classes are called abstract classes. - ppt download 1 Abstract Class There are some situations in which it is useful to define base classes that are never instantiated. Such classes are called abstract classes. - ppt download](https://images.slideplayer.com/23/6888289/slides/slide_2.jpg)
1 Abstract Class There are some situations in which it is useful to define base classes that are never instantiated. Such classes are called abstract classes. - ppt download
![Abstract Classes An abstract class is a placeholder in a class hierarchy that represents a generic concept An abstract class cannot be instantiated. - ppt download Abstract Classes An abstract class is a placeholder in a class hierarchy that represents a generic concept An abstract class cannot be instantiated. - ppt download](https://slideplayer.com/4664721/15/images/slide_1.jpg)