| /* File : example.h */ |
| |
| class Shape { |
| public: |
| Shape() { |
| nshapes++; |
| } |
| virtual ~Shape() { |
| nshapes--; |
| }; |
| double x, y; |
| void move(double dx, double dy); |
| virtual double area(void) = 0; |
| virtual double perimeter(void) = 0; |
| static int nshapes; |
| }; |
| |
| class Circle : public Shape { |
| private: |
| double radius; |
| public: |
| Circle(double r) : radius(r) { }; |
| virtual double area(void); |
| virtual double perimeter(void); |
| }; |
| |
| class Square : public Shape { |
| private: |
| double width; |
| public: |
| Square(double w) : width(w) { }; |
| virtual double area(void); |
| virtual double perimeter(void); |
| }; |
| |
| typedef Square TSquare; |
| class CFoo |
| { |
| public: |
| static Square MakeSquare(void) {return Square(4.0);}; |
| static TSquare MakeTSquare(void) {return Square(4.0);}; |
| }; |
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