gwj / po_oopc · Files

#include <iostream>
using namespace std;

class base
{
public:
  base() { cout << "base()" << endl;}
  virtual void f() { cout << "base" << endl; };
  void g() { this->f(); };
  virtual ~base() { this->f(); cout << "~base()" << endl;};
};

class derived : public base
{
int *ptr;
public:
  derived() { ptr = new int(7); cout << "derived()" << endl;};
  ~derived() { delete ptr; cout << "~derived()" << endl;};
  void f() override { cout << "derived " << *ptr << endl; };
};

int main()
{
 base* ptr = new derived;
 ptr -> g();
 ptr -> f();
 delete ptr;
}