代码

#include <iostream>

using namespace std;

class Sofa
{
private:
    string sit;
    int *len;
public:
    Sofa()
    {
        cout << "Sofa::无参构造函数" << endl;
    }
    Sofa(string sit,int len):sit(sit),len(new int(len))
    {
        cout << "Sofa::有参构造函数" << endl;
    }
    ~Sofa()
    {
        delete len;
        cout << "Sofa::析构函数" << endl;
    }
    Sofa &operator=(const Sofa &other)
    {
        if(this != &other)
        {
            sit = other.sit;
            len = new int(*(len));
        }
        cout << "Sofa::拷贝赋值函数" << endl;
        return *this;
    }
    Sofa(const Sofa &other):sit(other.sit),len(new int(*(other.len)))
    {

        cout << "Sofa::拷贝构造函数" << endl;
    }
    void show()
    {
        cout << sit << '\t' << "沙发的长度为:" << *len;
    }
};
class Bed
{
private:
    string sleep;
public:
    Bed()
    {
        cout << "Bed::无参构造函数" << endl;
    }
    Bed(string sleep):sleep(sleep)
    {
        cout << "Bed::有参构造函数" << endl;
    }
    ~Bed()
    {
        cout << "Bed::析构函数" << endl;
    }
    Bed &operator=(const Bed &other)
    {
        if(this != &other)
        {
            sleep = other.sleep;
        }
        cout << "Bed::拷贝赋值函数" << endl;
        return *this;
    }
    Bed(const Bed &other):sleep(other.sleep)
    {
        cout << "Bed::拷贝构造函数" << endl;
    }
    void show()
    {
        cout << '\t' << sleep << '\t';
    }
};
class Sofa_Bed:public Sofa,public Bed
{
private:
    string color;
public:
    Sofa_Bed()
    {
        cout << "Sofa_Bed::无参构造函数" << endl;
    }
    Sofa_Bed(string sit,int len,string sleep,string color):Sofa(sit,len),Bed(sleep),color(color)
    {
        cout << "Sofa_Bed::有参构造函数" << endl;
    }
    ~Sofa_Bed()
    {
        cout << "Sofa_Bed::析构函数" << endl;
    }
    Sofa_Bed &operator=(const Sofa_Bed &other)
    {
        if(this != &other)
        {
            Sofa::operator=(other);
            Bed::operator=(other);
            color = other.color;
        }
        cout << "Sofa_Bed::拷贝赋值函数" << endl;
        return *this;
    }
    Sofa_Bed(const Sofa_Bed &other):Sofa(other),Bed(other),color(other.color)
    {
        cout << "Sofa_Bed::拷贝构造函数" << endl;
    }
    void show()
    {
        cout << "沙发的颜色为:" << color << endl;
    }

};
int main()
{
    Sofa_Bed SB1("坐",185,"睡","pink");
    SB1.Sofa::show();
    SB1.Bed::show();
    SB1.show();

    return 0;
}

效果图：

思维导图：