C / C++ / MFC

_T("No name") wrote:

drawing does not come properly

_T("No name") wrote:

my drawing coming distorted

#include <boost/shared_ptr.hpp>
#include <iostream>

class A
{
public:
   ~A() { std::cout << "A::~A()\n"; }
};

class B
{
public:
   ~B() { std::cout << "B::~B()\n"; }
};

class C : public A, public B
{
public:
   ~C() { std::cout << "C::~C()\n"; }
};

int main(int argc, char** argv)
{
   {
      std::cout << "Enter pC\n";
      boost::shared_ptr<C> pC(new C);
      {
         std::cout << "Enter pB\n";
         boost::shared_ptr<B> pB (pC);
         std::cout << "Exit pB\n";
      }
      {
         std::cout << "Enter pA\n";
         boost::shared_ptr<A> pA (pC);
         std::cout << "Exit pA\n";
      }
      std::cout << "Exit pC\n";
   }
}

Enter pC
Enter pB
Exit pB
Enter pA
Exit pA
Exit pC
C::~C()
B::~B()
A::~A()

shared_ptr<Base1> pBase1(new Derived);
Derived* pDerived = dynamic_cast<Derived*>(pBase1.get());
shared_ptr<Base2> pBase2(pDerived);

#include <iostream>
#include <boost/shared_ptr.hpp>

class A
{
public:
   virtual ~A() { std::cout << "~A\n"; }   
};

class B
{
public:
   virtual ~B() { std::cout << "~B\n"; }   
};

class C : public A, public B
{
public:
   virtual ~C() { std::cout << "~C\n"; }   
};
       
int main(int argc, char** argv)
{
   boost::shared_ptr<A> pA(new C);
   boost::shared_ptr<C> pC = boost::dynamic_pointer_cast<C>(pA);
   boost::shared_ptr<B> pB(pC);
}