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  • 第十一周项目4-类族的设计

    按以下的提示,由基类的设计和测试开始,逐渐地完成各个类的设计,求出圆格柱体的表面积、体积并输出并且完成要求的计算任务:

    (1)先建立一个Point(点)类,包含数据成员x,y(坐标点),实现需要的成员函数,并设计main函数完成测试;

    /*
     *Copyright (c) 2015,烟台大学计算机学院
     *All gight reserved.
     *文件名称:Demo.cpp
     *作者:邵帅
     *完成时间:2015年05月25日
     *版本号:v1.0
    */
    #include <iostream>
    using namespace std;
    class Point
    {
    public:
        Point(double x=0,double y=0);
        void setpoint(double x0,double y0)
        {
            x=x0;
            y=y0;
        }
        double getx(){return x;}
        double gety(){return y;}
    private:
        double x,y;
    };
    Point::Point(double x0,double y0):x(x0),y(y0){}
    int main()
    {
        Point p;
        p.setpoint(2,3);
        cout<<"x="<<p.getx()<<endl;
        cout<<"y="<<p.gety()<<endl;
    }
    


    (2)以Point为基类,派生出一个Circle(圆)类,增加数据成员r(半径),以及求面积的成员函数area,实现其他需要的成员函数,设计main函数完成测试;

    /*
     *Copyright (c) 2015,烟台大学计算机学院
     *All gight reserved.
     *文件名称:Demo.cpp
     *作者:邵帅
     *完成时间:2015年05月25日
     *版本号:v1.0
    */
    #include <iostream>
    using namespace std;
    class Point
    {
    public:
        Point(double x=0,double y=0);
        void setpoint(double a,double b)
        {
            x=a;
            y=b;
        }
        double getx(){return x;}
        double gety(){return y;}
    protected:
        double x,y;
    };
    Point::Point(double a,double b):x(a),y(b){}
    class Circle:public Point
    {
    public:
        Circle(double x=0,double y=0,double r=0);
        void setradius(double);
        double getradius();
        double area();
    protected:
        double radius;
    };
    Circle::Circle(double a,double b,double r):Point(a,b),radius(r){}
    void Circle::setradius(double r0)
    {
        radius=r0;
    }
    double Circle::getradius() {return radius;}
    double Circle::area()
    {
        double s;
        const double pi=3.1415;
        s=pi*radius*radius;
        return s;
    }
    int main()
    {
        Circle p;
        p.setpoint(2,3);
        p.setradius(3);
        cout<<"圆心坐标:"<<endl;
        cout<<"x="<<p.Point::getx()<<endl;
        cout<<"y="<<p.Point::gety()<<endl;
        cout<<"圆的半径=";
        cout<<p.getradius()<<endl;
        cout<<"圆的面积=";
        cout<<p.area();
    }
    


    (3)再以Circle类为直接基类,派生出一个Cylinder(圆柱体)类,再增加数据成员h(高),,以及求圆柱表面积的成员函数area和求圆柱体积的成员函数volume,实现需要的成员函数,并设计main函数完成测试。

    /*
     *Copyright (c) 2015,烟台大学计算机学院
     *All gight reserved.
     *文件名称:Demo.cpp
     *作者:邵帅
     *完成时间:2015年05月25日
     *版本号:v1.0
    */
    #include <iostream>
    using namespace std;
    class Point
    {
    public:
        Point(double x=0,double y=0);
        void setpoint(double a,double b)
        {
            x=a;
            y=b;
        }
        double getx(){return x;}
        double gety(){return y;}
    protected:
        double x,y;
    };
    Point::Point(double a,double b):x(a),y(b){}
    class Circle:public Point
    {
    public:
        Circle(double x=0,double y=0,double r=0);
        void setradius(double);
        double getradius();
        double area();
    protected:
        double radius;
    };
    Circle::Circle(double a,double b,double r):Point(a,b),radius(r){}
    void Circle::setradius(double r0)
    {
        radius=r0;
    }
    double Circle::getradius() {return radius;}
    double Circle::area()
    {
        double s;
        const double pi=3.1415;
        s=pi*radius*radius;
        return s;
    }
    class Cylinder:public Circle
    {
    public:
        Cylinder(double x=0,double y=0,double r=0,double h=0);
        void setheight(double);
        double getheight();
        double volume();
        double larea();
    protected:
        double height;
    };
    Cylinder::Cylinder(double a,double b,double r,double h):Circle(a,b,r),height(h){}
    void Cylinder::setheight(double h)
    {
        height=h;
    }
    double Cylinder::getheight(){return height;}
    double Cylinder::larea()
    {
        double s;
        s=2*Circle::area( )+2*3.14159*radius*height;
        return s;
    }
    double Cylinder::volume()
    {
        double v;
        v=area()*height;
        return v;
    }
    int main()
    {
        Cylinder p;
        p.setpoint(2,3);
        p.setradius(3);
        p.setheight(5);
        cout<<"圆柱底圆圆心坐标:"<<endl;
        cout<<"x="<<p.Point::getx()<<endl;
        cout<<"y="<<p.Point::gety()<<endl;
        cout<<"圆柱底圆圆的半径=";
        cout<<p.getradius()<<endl;
        cout<<"圆柱的表面积=";
        cout<<p.larea()<<endl;
        cout<<"圆柱的高=";
        cout<<p.getheight()<<endl;
        cout<<"圆柱的体积=";
        cout<<p.volume();
    }
    


    @ Mayuko

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  • 原文地址:https://www.cnblogs.com/mayuko/p/4567486.html
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