[c-prog] Re: undefined refernece

[Saurabh Jain]

--- In c-prog@yahoogroups.com, "Brett McCoy" <[EMAIL PROTECTED]> wrote:
>
> On Mon, Mar 24, 2008 at 7:10 AM, pat.morgan74 <[EMAIL PROTECTED]> wrote:
> 
> >  I am stuck with a simple problem.Its eating fri=om with in
> >
> >  My code is as below
> >  in the file where main is
> >
> >  #include class.h
> >  int main()
> >  {
> >  classa ex;
> >
> >  }
> >
> >  in .h file
> >  class classa
> >  {
> >  classa();
> >  ~classa();
> >
> >  };
> >
> >  in the .cc file
> >  #include class.h
> >  classa::classa()
> >  {}
> >  classa::~classa()
> >  {}
> >
> >  But g++ is throwing an error in main "undefined reference to
> >  classa::classa()"
> >  whats am i doing wrong?
> 
> It seems like a linking problem. How are you compiling these files?
> With a makefile?

One more thing, why is the constructor/destructor private? Doesn't
look like you are trying to create a singleton in main().

Regards,
Saurabh