[comp.lang.c++] Zortech C++ problem.

rjv@umb.umb.edu (Rafael J. Vicente) (06/21/89)

To the Zortech guys (Walter Bright ?) , the following question:
 The following program should print a 'B' , but the output is a D.
 Any fixes ?
 
 
I enjoy your product (1.07) but this problem kept a program from running
for a while.


#include <stdio.h>
 
class B{
public:
 virtual f() { return 'B';}
 virtual g() ;
  };
 
class D: public B{
 public:
  D() { putchar(B::g()); }
  f() {return 'D'; }
  g() { }
  };
 
 static h(B * t)
  { return t->B::f();
  }
 
 B::g(){ return h(this); }
 
main()
 { D d;
   puts("finished\n");
   } 



------------------------------------------------------------------------------
Rafael Vicente
U. of Lowell (D.Sc. student/aficionado).
#include <disclaimers.h>
" I've just found a way out of the halting problem, but wait a sec...."
_____________________________________________________________________________

Roy.Browning@f506.n106.z1.fidonet.org (Roy Browning) (07/03/89)

 > From: rjv@umb.umb.edu (Rafael J. Vicente)
 > Date: 21 Jun 89 03:23:32 GMT
 > Organization: UMASS-Boston, Boston, MA
 > Message-ID: <793@umb.umb.edu>
 > Newsgroups: comp.lang.c++
 > 
 > To the Zortech guys (Walter Bright ?) , the following question:
 >  The following program should print a 'B' , but the output is a D.
 >  Any fixes ?
 >  
 class D: public B {
      public:
      D() { putchar(B::g()); }
      f() {return 'D'; }
      void g() { }
  };

Rafael:

        With the minor modification above the code compiles and works per your expectations in version 1.5.  The problem has been corrected for future releases.  Walter himself will have to supply any workaround for version 1.07.

                                Roy Browning