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 <iostream.h>

#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"<<cy1;

Point &pRef=cy1;

cout<<"pRef as a point:"<<pRef;

Circle &cRef=cy1;

cout<<"cRef as a Circle:"<<cRef;

return 0;

}

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=15

area=1060.29, volume=2650.72

pRef as a point:[5,5]

cRef as a Circle:Center=[5,5], r=7.5, area=176.714

im0qianqian_站在回忆的河边看着摇晃的渡船终年无声地摆渡,它们就这样安静地画下黄昏画下清晨......

#include <iostream>

using namespace std;

#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;

};

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<<"["<<b.x<<","<<b.y<<"]"<<endl;

    return a;

}

ostream &operator<<(ostream &a,const Circle &b)

{

    a<<"Center=["<<b.x<<","<<b.y<<"], r="<<b.radius<<", area="<<b.radius*b.radius*PI<<endl;

    return a;

}

ostream& operator<<(ostream &a,const Cylinder &b)

{

    a<<"Center=["<<b.x<<","<<b.y<<"], r="<<b.radius<<", h="<<b.height<<endl;

    a<<"area="<<2*PI*b.radius*b.radius+2*PI*b.radius*b.height<<", volume="<<b.radius*b.radius*PI*b.height<<endl;

    return a;

}

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"<<cy1;

    Point &pRef=cy1;

    cout<<"pRef as a point:"<<pRef;

    Circle &cRef=cy1;

    cout<<"cRef as a Circle:"<<cRef;

    return 0;

}

巴特西

YTU 2922: Shape系列-8

2922: Shape系列-8

题目描述

输入

输出

样例输出

im0qianqian_站在回忆的河边看着摇晃的渡船终年无声地摆渡,它们就这样安静地画下黄昏画下清晨......

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