Re: mutual dependency

From:
Victor Bazarov <v.Abazarov@comAcast.net>
Newsgroups:
comp.lang.c++
Date:
Fri, 30 Oct 2009 13:17:00 -0400
Message-ID:
<hcf71r$mgv$2@news.datemas.de>
Saeed Amrollahi wrote:

On Oct 30, 3:21 pm, Victor Bazarov <v.Abaza...@comAcast.net> wrote:

Saeed Amrollahi wrote:

On Oct 30, 11:47 am, thomas <freshtho...@gmail.com> wrote:

-------------code------------
class A{
public:
     A(){}
     void f(){
           B *b = new B();
     }
};
class B{
public:
      B(){}
      void f(){
          A *a = new A();
      }};
---------------code------------
for the above sample code, there's compile error.
if I put a declaration "class B;" at the begining, it says that no
default constructor.
how to declare a default constructor to avoid the compile error?

[..]
FYI, such mutual dependency isn't good sign of object-oriented design.

Really? Why is that?

V
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- Show quoted text -


Hi Victor
I just mean, with a good design, we can avoid such mutual
dependencies.


Do explain. Please.

I face with the following code patterns a lot of times:
class A {
  B* pB;
};

class B {
  A* pA;
};

with a review on class design I can avoid such "mutual" dependencies.


But that's not what the OP has. Look again.

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

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