C++ 14 Quick Syntax Reference, Second Edition

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 ...