Re: [Dev-C++] Strange effect

[Jason H. <jas...@bt...>]

I'm glad someone else agrees with me. :)

Now onto the static issue, "In C++, when static is used on a class =
*data* member, it causes only one copy of that member to be shared by =
all objects of its class", (C/C++ Programmer's Reference, second edition =
- Herbert Schildt).

"Member functions may also be declared as static. There are several =
restrictions placed on static member functions. They may only directly =
refer to other static members of the class. (Of course, global functions =
and data my be accessed by static member functions.) A static member =
function does not have a this pointer....", (C++ The Complete Reference, =
Third Edition - Herbert Schildt, p.315). The reason that a static member =
can't access non-static members is because it doesn't have a this =
pointer and has no frame of reference to get to the data, but a static =
data member is a single defined instance which therefore has a specific =
place in memory that can be directly refered to. There still only needs =
to be one copy of the member function. In the end a static member is a =
special case used to overcome specific problems.

Jason.


----- Original Message -----=20
  From: Daniel Glenfield=20
  To: dev...@li...=20
  Sent: Monday, October 22, 2001 9:48 PM
  Subject: RE: [Dev-C++] Strange effect






  objects have their own data members, they share the member functions =
in the class they are a part of. They do not have their own functions, =
this I am sure of.



  >From: "Ioannis Vranos"=20
  >To: "Dev-C++"=20
  >Subject: RE: [Dev-C++] Strange effect=20
  >Date: Mon, 22 Oct 2001 23:43:25 +0200=20
  >=20
  >:) That every object has its own data members whhich these functions=20
  >manipulate. Except of that, for what static data members and static=20
  >member functions exist for?=20
  >=20
  >=20
  >=20
  >Ioannis=20
  >=20
  >* Ioannis Vranos=20
  >* Programming pages: http://www.noicys.f2s.com=20
  >=20
  >* Alternative URL: http://run.to/noicys=20
  >=20
  >-----Original Message-----=20
  >From: dev...@li...=20
  >[mailto:dev...@li...] On Behalf Of =
Daniel=20
  >Glenfield=20
  >Sent: Monday, October 22, 2001 10:30 PM=20
  >To: dev...@li...=20
  >Subject: RE: [Dev-C++] Strange effect=20
  >=20
  >=20
  >=20
  >I am 100% certain that each object does NOT have it's own copy of the =

  >member functions. What reason would there be?=20
  >=20
  >=20
  >=20
  > >From: "Ioannis Vranos"=20
  > >To: "Dev-C++"=20
  > >Subject: RE: [Dev-C++] Strange effect=20
  > >Date: Mon, 22 Oct 2001 22:44:21 +0200=20
  > >=20
  > >I do not think this is true. Every object has its own member =
functions.=20
  >=20
  > >Except of that, here wrong data members are being created too.=20
  > >=20
  > >=20
  > >Ioannis=20
  > >=20
  > >* Ioannis Vranos=20
  > >* Programming pages: http://www.noicys.f2s.com=20
  > >=20
  > >* Alternative URL: http://run.to/noicys=20
  > >=20
  > >=20
  > >-----Original Message-----=20
  > >From: dev...@li...=20
  > >[mailto:dev...@li...] On Behalf Of =
Daniel=20
  > >Glenfield=20
  > >Sent: Monday, October 22, 2001 7:56 PM=20
  > >To: dev...@li...=20
  > >Subject: RE: [Dev-C++] Strange effect=20
  > >=20
  > >=20
  > >=20
  > >An object holds it's own data members but does not have it's own =
copy=20
  >of=20
  > >member functions - there is one instance of a member function that =
is=20
  > >used by all (since it does not change, while data members do).=20
  > >=20
  >=20
  > _____=20
  >=20
  >Get your FREE download of MSN Explorer at http://explorer.msn.com=20
  >=20
  >_______________________________________________ Dev-cpp-users mailing =

  >list Dev...@li...=20
  >https://lists.sourceforge.net/lists/listinfo/dev-cpp-users=20
  >=20


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