c08p404a.txt

来自「Data Abstraction & Problem Solving with 」· 文本 代码 · 共 8 行

class EquidistantShape  // abstract base class
{
public:
   virtual void setRadius(double newRadius) = 0;
   virtual double getRadius() const = 0;
   virtual void displayStatistics() const = 0;
};  // end class