#ifndef?RECT_H
#define?RCET_H
#include"Shape.h"
class?Rcet:public?Shape
{
public:
????Rect(double?width,double?height);
????~Rect();
????double?calcArea();
protected:
????double?m_dWidth;
????double?m_dHeight;
};

#endif

error C4430: 缺少類型說明符 - 假定為 int。注意: C++ 不支持默認 一模一樣的代碼為什么VS2017一直提示構造函數和析構函數有問題