From:	"Ilya P. Ryzhenkov" <ILYA AT spy DOT isp DOT nsc DOT ru>
Organization:	ISPh SB RAS
To:	djgpp AT delorie DOT com
Date:	Wed, 23 Oct 1996 14:59:31 GMT+0600
Subject:	Re: Laugh at my mistakes (Errors you wish you're mother tol
Message-ID:	<11F7A236E18@spy.isp.nsc.ru>

RI> Just for starters.  Welcome to 'C'.  Have fun!
 Where is welcome to 'C++' ? ;-)
 An example when, virtual functions doesn't work :
 
 class Dummy {
 protected :
  int SomeData;
  void Copy(Dummy *p) 
   {
    memcpy(this,p,sizeof(Dummy));
   }
 public :
  Dummy() {};
  Dummy(Dummy *p) { Copy(p); }; // copy constructor
  virtual f() { printf("This is dummy!\n"); };
 }

 class Dummy2 : public Dummy {

 public :
  Dummy2() {};
  Dummy2(Dummy *p) { Copy(p); }; //copy constructor
  virtual f() { printf("This is dummy2!\n"); };
 };
 
 void main()
 {
  Dummy *p1=new Dummy();
  p1->f(); // prints "This is dummy!"
  Dummy *p2=new Dummy2(p1);
  p2->f(); // also prints "This is dummy!"
 };
 
 Have fun with C++ too ! ;))
 
======================================================================
Institute of Semiconductors Physics                Ilya P. Ryzhenkov 
Russian Academy of Sciencies             e-mail: ilya AT spy DOT isp DOT nsc DOT ru
Siberian Branch                          http://spy.isp.nsc.ru

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