Download - 10 Polymorphism

Transcript
  • 1. - 2 10. . 2

2. Challenges

  • ( StackAggregatingArray ,StackDerivedFromArray ,StackOnList)
  • / ( DoubleList, CyclicList)
  • Mixin() : ( PeekBack , Iterated)

3.

  • classParallelogram
  • {
  • protected :
  • double _ height;
  • double _ width;
  • double _ angle;
  • public :
  • Parallelogram ( doubleh,doublew,doublea);
  • doublearea()const ;
  • doubleheight()const ;
  • doublewidth()const ;
  • doubleangle()const ;
  • };

4.

  • ( )
  • classRhombus:publicParallelogram
  • {
  • public :
  • Rhombus ( doubleh,doublea) :
  • Parallelogram (h, h, a){ };
  • };

5.

  • classRectangle:publicParallelogram
  • {
  • public :
  • static constdouble pi = 3.1415926535897932;
  • Rectangle ( doubleh,doublew) :
  • Parallelogram (h, w, pi/2){ };
  • doublearea()double
  • {
  • return_height *_ width;
  • }
  • };

6. 7.

  • ,
  • Rhombus rh(10, pi/4);
  • rh.area(); rh.height(); rh.width(); rh.angle();
  • Rectangle rec(10,20);
  • //
  • rec.area();
  • //
  • Parallelogram :: rec.area();
  • rec.height(); rec.width(); rec.angle();

8.

  • classRectangle:publicParallelogram
  • {
  • private :
  • using Parallelogram ::area();
  • public :
  • static constdouble pi = 3.1415926535897932;
  • Rectangle ( doubleh,doublew) :
  • Parallelogram (h, w, pi/2){ };
  • doublearea()double ;
  • };

9. Mixin() :

  • classPredator
  • {
  • private :
  • string _name;
  • string _favoritePray;
  • public :
  • Predator (string name, pray);
  • };

10. Mixin:

  • classPet
  • {
  • private :
  • string _name;
  • string _favoriteToy;
  • public :
  • Pet (string name, string toy);
  • };

11. Mixin:

  • classCat:publicPredator,publicPet
  • {
  • private :
  • static unsigned int _freeID;
  • unsigned int_myCatID;
  • public :
  • Cat (string name, string toy, string prey):
  • _myCatID (_freeID++),
  • Predator (name, prey), Pet (name, toy){ };
  • };

12. Mixin:

  • classCat:publicPredator, p ublicPet

13. Consistency()

  • '?
  • const string&Predator :: rename (string newname)
  • {
  • returnname = newname;
  • }
  • voidcat::show()const {
  • coutwhoAmI();

32.

  • ( )
  • ' , ',
  • Parallelogram par=Rectangle(10, 20);

33.

  • ()
  • classStack
  • {
  • public :
  • virtual ~Stack () {} ;
  • virtual constElem& top() const =0;
  • virtual voidpop() =0;
  • virtual voidpush( const Elem &value) =0;
  • };

34.

  • ,
  • ,
  • ' (?)

35.

  • classStackAggregatingArray: publicStack
  • {
  • public :
  • StackAggregatingArray ( size_t );
  • ~StackAggregatingArray ();
  • constElem& top() const;
  • voidpop() ;
  • voidpush( const Elem &value) ;
  • private :
  • static constsize_t_ bos;
  • size_t _top;
  • Array _array ;
  • };

36.

  • classStackAggregatingArray: publicStack
  • {
  • public :
  • StackAggregatingArray ( size_t );
  • virtual~StackAggregatingArray ();
  • virtualconstElem& top() const;
  • virtualvoidpop() ;
  • virtualvoidpush( const Elem &value) ;
  • private :
  • static constsize_t_ bos;
  • size_t _top;
  • Array _stackArray ;
  • };

37. 38.

  • ()
  • , ,

39.

  • voidprocess(Stack & stack)
  • {
  • cout

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