Characteristics of inheritance

example, the parent class is car

Subclass is Trush_car

1. You can declare a parent class, create a subclass
• Where the parent class can appear, the subclass can appear
• Car Acar = new Trash_car ();
2. Declaring what type, you can only call properties and methods of this type
   • As Acar cannot call the Fill_trush () method because there is no such method in the car parent class
3. What type is created and what type of method is run

• • Push_back () is the parent class definition and the subclass inherits the method;

    Acar.push_back (); Calls a method of a subclass other than the parent class.

4. What type is created and what type can be cast

• b= (Trash_car) Acar; Because Acar itself is a trash object created (although the declaration is not the same)

Characteristics of inheritance