YTU 2922: Shape系列-8

YTU 2922: Shape系列-8

2922: Shape系列-8

时间限制: 1 Sec   内存限制: 128 MB

提交: 172

解决: 99

题目描述

小聪又想借用小强的Shape类了，但是不巧的是小强去考英语四级去了

，但是小聪自力更生创建了Point类，但是他没有写Point类、继承Point类的Circle类、继承Circle类的Cylinder类这3个类的构造函数，请你帮忙补充这几个类未完成的函数。

小聪写的各种类

#include #define PI 3.14159 class Point { public: Point(float=0,float=0); void setPoint(float,float); float getX()const ; float getY()const ; friend ostream & operator<<(ostream &,const Point &); protected: float x,y; }; class Circle:public Point { public: Circle(float x=0,float y=0,float r=0); void setRadius(float); float getRadius() const; float area () const; friend ostream &operator<<(ostream &,const Circle &); protected: float radius; }; 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; }; //小聪用于测试的函数 int main() { Cylinder cy1(3.5,6.4,5.2,10); cy1.setHeight(15); cy1.setRadius(7.5); cy1.setPoint(5,5); cout<<"new cylinder:\n"<

提示：不用提交全部程序，只提交补充部分。

输入

无

输出

输出小聪测试的各个数据

样例输出

new cylinder:Center=[5,5], r=7.5, h=15area=1060.29, volume=2650.72pRef as a point:[5,5]cRef as a Circle:Center=[5,5], r=7.5, area=176.714

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#include using namespace std;#define PI 3.14159class Point{public: Point(float=0,float=0); void setPoint(float,float); float getX()const ; float getY()const ; friend ostream & operator<<(ostream &,const Point &);protected: float x,y;};class Circle:public Point{public: Circle(float x=0,float y=0,float r=0); void setRadius(float); float getRadius() const; float area () const; friend ostream &operator<<(ostream &,const Circle &);protected: float radius;};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;};Cylinder::Cylinder(float x,float y,float r,float h){ height=h; radius=r; this->y=y; this->x=x;}Circle::Circle(float x,float y,float r) {}void Cylinder::setHeight(float a){ height=a;}Point::Point(float a,float b) {}void Circle::setRadius(float a){ radius=a;}void Point::setPoint(float a,float b){ x=a; y=b;}ostream & operator<<(ostream &a,const Point &b){ a<<"["<

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