作业12.4

1.沙发床的多继承

#include <iostream>

using namespace std;
class Sofa
{
private:
    string sit;
public:
    //无参构造
    Sofa(){}
    //有参构造
    Sofa(string sit):sit(sit){}
    //拷贝构造
    Sofa(const Sofa &other):sit(other.sit){}
    //拷贝赋值
    Sofa &operator = (const Sofa &other)
    {
        if(this != &other)
        {
            sit=other.sit;
        }
        return *this;
    }
    //析构函数
    ~Sofa(){}
    void show()
    {
        cout << "sit=" << sit;
    }
};
class Bed
{
private:
    string *sleep;
public:
    //无参构造
    Bed(){}
    //有参构造
    Bed(string sleep):sleep(new string(sleep)){}
    //拷贝构造
    Bed(const Bed &other):sleep(new string(*(other.sleep))){}
    //拷贝赋值
    Bed &operator = (const Bed &other)
    {
        if(this != &other)
        {
            sleep=other.sleep;
        }
        return *this;
    }
    //析构函数
    ~Bed(){}
    void show()
    {
        cout << " sleep=" << *sleep;
    }
};
class Sofa_Bed:public Sofa,public Bed
{
private:
    string color;
public:
    //无参构造
    Sofa_Bed(){}
    //有参构造
    Sofa_Bed(string sit,string sleep,string color):Sofa(sit),Bed(sleep),color(color){}
    //拷贝构造
    Sofa_Bed(const Sofa_Bed &other):Sofa(other),Bed(other),color(other.color){}
    //拷贝赋值
    Sofa_Bed &operator = (const Sofa_Bed & other)
    {
        if(this != &other)
        {
            Sofa::operator=(other);
            Bed::operator=(other);
            color=other.color;
        }
        return *this;
    }
    //析构函数
    ~Sofa_Bed(){}
    void show()
    {
        Sofa::show();
        Bed::show();
        cout << " color=" << color << endl;
    }
};

int main()
{
    Sofa_Bed bs;
    Sofa_Bed bs1("可做","可睡","白色");
    bs1.show();
    bs=bs1;
    bs.show();
    Sofa_Bed bs2 = bs1;
    bs2.show();
    return 0;
}

2.思维导图