学习记录--C++继承与派生编程题

1.设计一个圆类circle和一个桌子类table，另设计一个圆桌类roundtable，它是从前两个类派生出来的

要求输出一个圆桌的高度，面积与颜色等。

#include<iostream>

#include<string>

using namespace std;

#define PI 3.14;

class circle

{

public:

    circle()

    {

        //默认构造函数

    }

    void setR(double r)

    {

        m_r = r;

    }

    double getR()

    {

        return m_r;

    }

    double getArea()

    {

        double area;

        area = m_r *m_r * PI;

        return area;

    }

protected:

    double m_r;//圆的半径

};

class table

{

public:

    table()

    {

        //默认构造函数

    }

    void setHigh(double high)

    {

        m_high = high;

    }

    double getHigh()

    {

        return m_high;

    }

protected:

    double m_high;//桌子的高度

};

class  roundtable : public circle, public table

{

public:

    roundtable()

    {

        //构造函数

    }

    void setC(string color)

    {

        m_color = color;

    }

    string getC()

    {

        return m_color;

    }

private:

    string m_color;//圆桌的颜色

};

int main()

{

    roundtable r1;

    r1.setR(2.0);

    r1.setHigh(1.3);

    r1.setC("紫色");

    cout << "圆桌的高为：" << r1.getHigh() << "米" << endl;

    cout << "圆桌的面积为：" << r1.getArea() << "平方米" << endl;

    cout << "圆桌的颜色为：" << r1.getC() << endl;

    system("pause");

    return 0;

}

2.定义描述矩形的类~~~~（题目略）

#include<iostream>

#include<string>

using namespace std;

class Rectangle

{

public:

    Rectangle() {}

    int CalArea()

    {

        int area;

        area = m_Length * m_Width;

        return area;

    }

    void setLength(int l)

    {

        m_Length = l;

    }

    int getLenght()

    {

        return m_Length;

    }

    void setWidth(int w)

    {

        m_Width = w;

    }

    int getWidth()

    {

        return m_Width;

    }

protected:

    int m_Length;

    int m_Width;

};

class Cuboid :public Rectangle

{

public:

    Cuboid(int l, int w, int h)

    {

        m_Length = l;

        m_Width = w;

        m_Chigh = h;

    }

    int CalVol()

    {

        m_Volume = m_Length * m_Chigh * m_Width;

        return m_Volume;

    }

    void Show()

    {

        cout << "长方体的长为：" << m_Length << endl;

        cout << "长方体的宽为：" << m_Width << endl;

        cout << "长方体的高为：" << m_Chigh << endl;

        cout << "长方体的体积为：" << CalVol() << endl;

    }

private:

    int m_Chigh;

    int m_Volume;

};

int main()

{

    Cuboid c1(10,20,30);

    c1.Show();

    system("pause");

    return 0;

}

运行截图

3.定义一个车基类（题目略）

#include<iostream>

#include<string>

using namespace std;

class Vehicle

{

public:

    Vehicle(int ms, int mw)

    {

        m_MaxSpeed = ms;

        m_Weight = mw;

    }

    int getMaxSpeed()

    {

        return m_MaxSpeed;

    }

    int getWeight()

    {

        return m_Weight;

    }

    void Run()

    {

        cout << "车的最大速度为：" << m_MaxSpeed << endl;

        cout << "车的重量为：" << m_Weight << endl;

    }

    void Stop()

    {

        cout << "车辆停下" << endl;

    }

    ~Vehicle(){}

protected:

    int m_MaxSpeed;

    int m_Weight;

};

//虚基类的virtual可以写在public前面，如

//virtual public Vehicle

//也可以写在public后面

class bicycle :public virtual Vehicle

{

public:

    bicycle(int ms, int mw, int h) :Vehicle(ms, mw)

    {

        m_height = h;

    }

    int getHeight()

    {

        return m_height;

    }

    void Run()

    {

        cout << "自行车的高为：" << m_height << endl;

    }

    void Stop()

    {

        cout << "自行车已停下" << endl;

    }

    ~bicycle(){}

private:

    int m_height;

};

class Motorcar :public virtual Vehicle

{

public:

    Motorcar(int ms, int mw, int sn) :Vehicle(ms, mw)

    {

        m_SetNum = sn;

    }

    int getSetNum()

    {

        return m_SetNum;

    }

    void Run()

    {

        cout << "汽车的座位数为：" << m_SetNum << endl;

    }

    void Stop()

    {

        cout << "汽车已停下" << endl;

    }

    ~Motorcar() {}

private:

    int m_SetNum;

};

class motorcycle :public bicycle, public Motorcar

{

public:

    motorcycle(int ms, int mw, int h, int sn) :Vehicle(ms, mw), bicycle(ms, mw, h), Motorcar(ms, mw, sn)

    {

    }

    void Run()

    {

        cout << "这是motorcycle" << endl;

        cout << "速度为：" << getMaxSpeed() << endl;

        cout << "高度为：" << getHeight() << endl;

        cout << "重量为为：" << getWeight() << endl;

        cout << "座位数为：" << getSetNum() << endl;

    }

    void Stop()

    {

        cout << "motorcycle stopped" << endl;

    }

    ~motorcycle(){}

};

int main()

{

    Vehicle v1(10, 20);

    v1.Run();

    v1.Stop();

}

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