作业要求：

代码：

#include <iostream>


using namespace std;


//沙发 类
class Sofa
{
private:
    string sitting; //是否可坐
    double *cost; //花费
public:
    //无参构造函数
    Sofa(){}

    //有参构造函数
    Sofa(string s,double c):sitting(s),cost(new double(c))
    {cout << "Sofa构造完成" << endl;}

    //拷贝构造函数
    Sofa(const Sofa &o):sitting(o.sitting),cost(o.cost)
    {cout << "Sofa拷贝完成" << endl;}

    //析构函数
    ~Sofa()
    {
        delete(cost);
        cost = nullptr;

        cout << "Sofa析构完成" << endl;
    }

    //拷贝赋值函数
    Sofa &operator=(const Sofa &o)
    {
        if(this != &o)
        {
            sitting = o.sitting;
            cost = o.cost;
            cout << "Sofa复制完成" << endl;
        }
        return *this;

    }

    //展示函数
    void show()
    {
        cout << sitting << " " << *cost << endl;
    }
};


//床 类
class Bed
{
private:
    string sleep;
    int *size;

public:
    //无参构造函数
    Bed(){}

    //有参构造函数
    Bed(string s,int size):sleep(s),size(new int(size))
    {cout << "Bed构造完成" << endl;}

    //拷贝构造函数
    Bed(const Bed &o):sleep(o.sleep),size(o.size)
    {cout << "Bed拷贝完成" << endl;}

    //析构函数
    ~Bed()
    {
        delete(size);
        size = nullptr;

        cout << "Bed析构完成" << endl;
    }

    //拷贝赋值函数
    Bed &operator=(const Bed &o)
    {
        if(this != &o)
        {
            sleep = o.sleep;
            size = o.size;
            cout << "Bed复制完成" << endl;
        }
        return *this;
    }

    //展示函数
    void show()
    {
        cout << sleep << " " << *size << endl;
    }
};


//沙发床 类  以公有继承方式继承于沙发和床
class Sofa_bed:public Sofa,public Bed
{
private:
    string color;
public:
    //无参构造函数
    Sofa_bed(){}

    //有参构造函数
    Sofa_bed(string col, string sit, double cost,string sle,int size):Sofa(sit,cost),Bed(sle,size),color(col)
    {
        cout << "Sofa_bed构造完成" << endl;
    }

    //拷贝构造函数
    Sofa_bed(const Sofa_bed &o):Sofa(o),Bed(o),color(o.color)
    {
        cout << "Sofa_bed拷贝完成" << endl;
    }

    //析构函数
    ~Sofa_bed()
    {
        cout << "Sofa_bed析构完成" << endl;
    }

    //拷贝赋值函数
    Sofa_bed &operator=(const Sofa_bed &o)
    {
        if(this != &o)
        {
           color = o.color;
           Sofa::operator=(o);
           Bed::operator=(o);
           cout << "Sofa_bed复制完成" << endl;
        }
        return *this;
    }

    //展示函数
    void show()
    {
        Sofa::show();
        Bed::show();
        cout << color << endl;
    }
};


int main()
{
    Sofa_bed bs("white", "可坐", 999,"可睡",100);

    cout << "****************************" << endl;

    bs.Sofa::show();

    cout << "****************************" << endl;

    bs.Bed::show();

    cout << "****************************" << endl;

    bs.show();

    return 0;
}

代码运行效果图：

思维导图：

​​​​​​​