Cours de C++ - Héritage

Cécile Braunstein

Description

CoursdeC++HéritageCécile [e-mail] de C++ 1 / 21BasiccasesAwidthC BCours de C++ 2 / 21sideheightradiusBasiccasesAwidthC BSquare Rectangle Circle Triangle_center _center _center _center_side _width _radius _pointAGetCenter() _height GetCenter() _pointBDraw() GetCenter() Draw() _pointCErase() Draw() Erase() GetCenter()Erase() Draw()Erase()Cours de C++ 2 / 21sideheightradiusLookmorecloserSquare Rectangle Circle Triangle_center _center _center _center_side _width _radius _pointAGetCenter() _height GetCenter() _pointBDraw() GetCenter() Draw() _pointCErase() Draw() Erase() GetCenter()Erase() Draw()Erase()Cours de C++ 3 / 21LookmorecloserSquare Rectangle Circle Triangle_center _center _center _center_side _width _radius _pointAGetCenter() _height GetCenter() _pointBDraw() GetCenter() Draw() _pointCErase() Draw() Erase() GetCenter()Erase() Draw()Erase()Cours de C++ 3 / 21LookmorecloserSquare Rectangle Circle Triangle_center _center _center _center_side _width _radius _pointAGetCenter() _height GetCenter() _pointBDraw() GetCenter() Draw() _pointCErase() Draw() Erase() GetCenter()Erase() Draw()Erase()Cours de C++ 3 / 21ClasshierarchyFigure_centerGetCenter()Draw()Erase()Polygon_Draw()Square Rectangle Circle Triangle_side _width _radius _pointADraw() _height Draw() _pointBDraw() _pointCDraw()Cours de C++ 4 / 21Protectionrevisitedclass Figure {private :Point _center;public ...

Informations

• Publié par: Iprie
• Nombre de lectures: 18
• Langue: English

Extrait

Cours de C++

Cours

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C++

Héritage

Cécile Braunstein [e-mail]

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Basic

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cases

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Basic

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Look

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more

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closer

3

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Look

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Look

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Class

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hierarchy

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Protection revisited

✞ classFigure { private: Point center; _

public: Figure(Point& center);

Point& GetCenter(); voidDraw(); voidErase();

}; ✝

Cours de C++

5/2 ✆ 1

Protection revisited

✞ classFigure { protected: Point _center;

public: Figure(Point& center);

Point& GetCenter(); voidDraw(); voidErase();

}; ✝

Cours de C++

5/2 ✆ 1

More about protection

LetBandCbe two classes such thatCderived fromBpublicaly.

privateandpublic • privatemembers ofB: Only classBmay access to these members • publicmembers ofB: Everyone may access to these members

protected • BandChave access to these members • They are still part of the interface • Users of classCcan not have direct access to these members

Coursed+C+6/12

Composition of protection

3 types of inheritance • public: Like the definition of a sub-type. • privateorprotected: Hide details of the implementation

Change access to the class members

oCrused+C+

Members of the base class public protected private

public

protected

private

protected

protected

private

no access

no access

no access

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