Path: utzoo!attcan!uunet!hite386!steve
From: steve@hite386.UUCP (Usenet mail account)
Newsgroups: comp.lang.c++
Subject: Zortech C++ bug
Keywords: Zortech, bug
Message-ID: <5@hite386.UUCP>
Date: 4 Mar 89 19:32:04 GMT
Organization: Tillinghast, Inc.
Lines: 48


The Zortech C++ compiler v1.07c has a problem with the following code:

#include <stream.hpp>

class Node {
public:
   virtual void print(ostream& o) {
       o << "I am a Node\n";
   }
};

class IntNode : public Node {
public:
  int n;
  IntNode(int a = 0) : n(a) {}
  void print(ostream& o) {
       o << "I am an IntNode with value " << n << "\n";
  }
};


main()
{
  Node n;
  IntNode in(17);

  n.print(cout);
  in.print(cout);
  in.Node::print(cout);
}


The expected output is:                 The output of ZTC++ v1.07c is:

I am a Node                             I am a Node
I am an Intnode with value 17           I am an Intnode with value 17
I am a Node                             I am an Intnode with value 17


Comments?

With appreciation:

The above code example was taken from "The Journal of Object Oriented Pro-
gramming" Jan/Feb 1989 (C) 1989 by SIGS Publications, Inc.  Permission
was granted verbally to me by publisher Richard P. Friedman to post
this code from Andrew Koenig's C++ column entitled "How Virtual Functions
Work", pages 73-74, to Usenet. 


Steve Hite
Jacksonville, Florida
uunet!hite386!steve