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6-6 【CPP0028】以圆类Circle及立体图形类Solid为基础设计圆柱类Cylinder

分数 10

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作者 C++多态编程

单位 石家庄铁道大学

以点类Point及平面图形类Plane为基类公有派生圆类Circle，再以圆类Circle及立体图形类Solid为基类公有派生圆柱类Cylinder，main(void)函数完成对圆柱类Cylinder的测试。

 

和昨天的圆锥类似

代码 复制，粘贴就好了 随便改改就对了 好简单

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#define PI 3.14159 class Circle:public Point,public Plane { private:     double radius;   public:       Circle(double a=0.0, double b=0.0, double c=0.0)     {         setX(a);         setY(b);         radius = c;         cout<<"Circle Constructor run"<<endl;     }       Circle(const Circle &p):Point(p)     {         radius=p.radius;         cout<<"Circle CopyConstructor run"<<endl;     }       ~Circle()     {        cout<<"Circle Destructor run"<<endl;     }       void setR(double r)     {        radius=r;     }       double getR()const     {        return radius;     }       void show()const     {         cout << "Circle(Point(" << "X=" << getX() << "," << "Y=" << getY() << ")," << "Radius=" << radius << ")";     }       double area() const     {         return radius * PI * radius;     }       double length() const     {         return 2 * radius * PI;     }       };   class Cylinder:public Circle,public Solid { private:     double height;   public:     Cylinder(double a=0.0, double b=0.0, double c=0.0, double d=0.0):Circle(a,b,c)     {         height=d;         cout<<"Cylinder Constructor run"<<endl;     }       Cylinder(const Cylinder &p):Circle(p)     {         height=p.height;         cout<<"Cylinder CopyConstructor run"<<endl;     }       ~Cylinder()     {         cout<<"Cylinder Destructor run"<<endl;     }       void show()const     {         cout<<"Cylinder(Circle(Point(X="<<getX()<<",Y="<<getY()<<"),Radius="<<getR()<<"),"<<"Height="<<height<<")";     }       double s_Area()const     {         return getR()*getR()*PI*2+2*PI*getR()*height;     }       double volume()const     {         return getR()*getR()*PI*height;     }        void setH(double a)      {          height=a;      }        double getH() const      {          return height;      }        };

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