Templates???

    
  [source]
  place code here
  [/source]
    

                    
class IMyPureVirtualBase
{
public:
   virtual void MyFunc1() = 0;
   virtual int MyFunc2( int nNum ) = 0;
   virtual char MyFunc3( char* strName ) = 0;
};
                    

    
class CMyDerivedClass : public IMyPureVirtualBase
{
public:
   void MyFunc1()
   {
      // Must declare the override even if the function is not implemented.

   }
   int MyFunc2( int nNum )
   {
   }
   char MyFunc3( char* strName )
   {
   }
};

class CMySecondDerivitive : public IMyPureVirtualBase
{
public:
   void MyFunc1()
   {
      // Note that I don''t have to use the virtual keyword here.

   }
   int MyFunc2( int nNum )
   {
   }
   char MyFunc3( char* strName )
   {
   }
};
    

            
// Typecast like this (the ANSI C style way) 
IMyPureVirtualBase* pMyPureVirtualBase = (IMyPureVirtualBase)new CMySecondSerivitive();

// Or you can typecast like this (The 1998 ANSI/ISO C++ standard)
IMyPureVirtualBase* pMyPureVirtualBase = static_cast<IMyPureVirtualBase*>( new CMySecondSerivitive() );
            

    
class CCanYouFindTheBug
{
  // D A T A 

private:
   int m_nMyData;
   int m_nMyData2;
   int m_nMyOtherData;

   // C O N S T R U C T I O N   /   D E S T R U C T I O N

public:
   CCanYouFindTheBug()
   {
      memset( this, 0, sizeof(this) );
   }
   ~CCanYouFindTheBug()
   {
   }

   // M E T H O D S

public:
   virtual void MyFunc1()
   {
   }
   virtual void MyFunc1()
   {
   }
};