Re: reference variables

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4 total messages Started by Jan Schiefer Sat, 08 Aug 1992 09:57

#21

Author: Jan Schiefer
Date: Sat, 08 Aug 1992 09:57

19 lines
1103 bytes

tmorgan@andromeda.rutgers.edu (Why? Only I Can Be Me) writes:
> I am having a problem finding documentation telling me whether a reference
> can be used in a c++ class.  I am using Borland C++ 3.1 and it gives me an

Yes, class member functions can take references as parameters and return
references. It is also possible to have a reference as a data member, but it
must be initialized properly.

> error when I try to do it.  However, I am not able to figure out how to do it
> or why I get the error.  So...is it possible.  If so, how 'bout an example.

What are you trying to do? What error do you get?

Cheers,
        Jan

--
             Jan Schiefer, DL5UE, jan@nasobem.stgt.sub.org
                 "Oracle et laboracle!"   - Fritz Hohl

Re: reference variables

#23

Author: Why? Only I Can Be Me
Date: Tue, 11 Aug 1992 15:30

17 lines
770 bytes

I do something similar to the following:
class X {
   int &var ;
public:
   constructor that initializes var...doesn't work.
   destructor
   rest of functions
     . 
     .
     .
} ;

I don't remember the error that I am getting, as I am doing this from memory.
I hope that what I gave you helps solve my dilemma.

Thanks,
Talib

Re: reference variables

#24

Author: Andre Pareis
Date: Wed, 12 Aug 1992 15:36

34 lines
1615 bytes

In article <Aug.11.11.30.04.1992.28134@andromeda.rutgers.edu>, tmorgan@andromeda.rutgers.edu (Why? Only I Can Be Me) writes:
|> I do something similar to the following:
|> class X {
|>    int &var ;
|> public:
|>    constructor that initializes var...doesn't work.
|>    destructor
|>    rest of functions
|>      . 
|>      .
|>      .
|> } ;
|> 
|> I don't remember the error that I am getting, as I am doing this from memory.
|> I hope that what I gave you helps solve my dilemma.
|> 
|> Thanks,
|> Talib


In Tom Swan's 'Learning C++' I found some lines about this problem.
One must convert this reference into a pointer, then all should work.
I'll read this part again and then tell the solution, but, since I borrowed
the book it could take some time.




-- 
				 -----------------------------------------------
				| Andr'e Pareis,				|
				| Internet:  pareis@cs.tu-berlin.de		|
				|	     subiaagb@w350zrz.zrz.tu-berlin.de	|
				 -----------------------------------------------

Re: reference variables

#26

Author: Dr. Raimund K. Ege
Date: Thu, 13 Aug 1992 18:56

46 lines
1925 bytes

In article <2QZ5GEP@mailgzrz.tu-berlin.de>, subiaagb@w350zrz.tu-berlin.de (Andre Pareis) writes:
|> In article <Aug.11.11.30.04.1992.28134@andromeda.rutgers.edu>, tmorgan@andromeda.rutgers.edu (Why? Only I Can Be Me) writes:
|> |> I do something similar to the following:
|> |> class X {
|> |>    int &var ;
|> |> public:
|> |>    constructor that initializes var...doesn't work.
|> |>    destructor
|> |>    rest of functions
|> |>      . 
|> |>      .
|> |>      .
|> |> } ;
|> |> 
|> |> I don't remember the error that I am getting, as I am doing this from memory.
|> |> I hope that what I gave you helps solve my dilemma.
|> |> 
|> |> Thanks,
|> |> Talib
|> 
|> 
|> In Tom Swan's 'Learning C++' I found some lines about this problem.
|> One must convert this reference into a pointer, then all should work.
|> I'll read this part again and then tell the solution, but, since I borrowed
|> the book it could take some time.
|> 

Das Problem liegt im Constructor.
Hier die Loesung:

	class X {
	   int &var;
         public:
           X(int i):var(i) {
             ...
           }
           .
           .
        };


-- 
Raimund K. Ege                             School of Computer Science
                                             Florida Int'l University
ege@scs.fiu.edu           (305) 348-3381              University Park
ege@servax.bitnet     FAX (305) 348-3549              Miami, FL 33199

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