English
- //习题12.1中的cylinder.h头文件
- //CYLINDER.H
- #include "circle.h"
- class Cylinder:public Circle
- {public:
- Cylinder (float x=0,float y=0,float r=0,float h=0);
- void setHeight(float);
- float getHeight() const;
- float area() const;
- float volume() const;
- friend ostream& operator<<(ostream&,const Cylinder&);
- protected:
- float height;
- };
