Programowanie Obiektowe w5

gistfile1.cpp

#include <iostream>
using namespace std;
 
class E
{
    int e;
public:
    E():e(5){}
    void get(){ cout << e << endl; }
};

class A
{
protected:
    static E *e;
public:
    virtual void get()=0;
};

E * A::e = new E;

class B: virtual public A
{
protected:
    int b;
public:
    B():b(20){}
    void get(){ cout << b << endl; }
};

class C: virtual public A
{
protected:
    int c;
public:
    C():c(30){}
    void get(){ cout << c << endl; }
};

class D: public B, public C
{
    int d;
public:
    D():d(40){}
    void get()
    {
        B::get();
        C::get();
        e->get();
        cout << d << endl;
    }
};

int main()
{
   A *a[3];
   B b; 
   C c;
   D d;
   
   a[0] = &b;
   a[1] = &c;
   a[2] = &d;
    
   for(int i = 0; i < 3; i++)
       a[i]->get();
}