cppPolyMorphismInheritance

#include <iostream>

class Parent
{
protected:
    int parentId;
public:
    virtual void doWork() const { std::cout << "Parents work!\n"; }
    virtual Parent& getThis() { return *this; }
    virtual void fun()= 0;
    virtual ~Parent() = 0;
};

Parent::~Parent() {};
void Parent::fun() { std::cout << "Base fun version\n"; };

class Child : public Parent
{
public:
    char childSym;
    int* pChild;
public:
    Child() :childSym{ 'Z' }, pChild{ new int{42} } {}
    void doWork() const override { std::cout << "Childs work!\n"; }
    Child& getThis() override { return *this; }
    void fun() { Parent::fun(); std::cout << "Child ver goes..\n"; }
    ~Child() { delete pChild; std::cout << "Child dtor\n"; }
};


int main()
{
    //Parent* pPtr{new Parent};

    //pPtr->doWork();

    Parent* pChild{ new Child };

    pChild->doWork();

//  delete pPtr;
    delete pChild;

    return 0;
}