CHAPTER 14
Inheritance
Inheritance allows a class to acquire the members of another class. In the example below, Square inherits from Rectangle. This is specified after the class name by using a colon followed by the public keyword, and the name of the class to inherit from. Rectangle then becomes a base class of Square, which in turn becomes a derived class of Rectangle. In addition to its own members, Square gains all accessible members in Rectangle, except for its constructors and destructor.
class Rectangle{ public: int x, y; int getArea() { return x * y; }};class Square : public Rectangle {};
Upcasting
An object can be upcast to its ...
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