C++ 多继承

01_多继承定义.cpp

#include<iostream>
using namespace std;

//父类先构造，子类先析构
struct GrandFather{
    int pound=2000000;
    GrandFather(){
        cout<<"grandfather construction"<<endl;}
    GrandFather(int p):pound(p){}
    ~GrandFather(){
        cout<<"grandfather destrucor"<<endl;}

};
struct Father: GrandFather{
    int dollor=1000000;
    Father(){
        cout<<"father construction"<<endl;}
    Father(int d):dollor(d){}
    ~Father(){
        cout<<"father destrucor"<<endl;}
};

struct GanFather {
    int gold=100;
    public:
    GanFather(){
        cout<<"gan father construction"<<endl;}
    GanFather(int g):gold(g){}
    ~GanFather(){
        cout<<"gan father destrucor"<<endl;}

};

struct Son: GanFather,Father{
    Son(){
        cout<<"Son construction"<<endl;}
    ~Son(){
        cout<<"Son destructor"<<endl;}
};

int main()
{
    Son s;
}

02_多继承的悖论.cpp

#include<iostream>

using namespace std;

struct Furniture{
    int color;
    int size;
    int weight;
};
//虚继承
struct Soft:
//  virtual 
    Furniture{
};
struct Bed:
//  virtual 
    Furniture{
};

struct SoftBed:Soft,Bed{
    SoftBed(){}
    SoftBed(int c,int s, int w)
//  :color(c),size(s),weight(w)
    {color=c;size=s,weight=w;}
    ~SoftBed(){}
};

int main()
{
    SoftBed s(1,100,200);
    cout<<s.weight<<endl;
}