dev-cpp-users — Dev-C++ users discussion list

Re: [Dev-C++] YOU MUST READ THIS OR THE NEXT "UNSUBSCRIBE ME" MESSAGE AND THE ANSWERS (DO I NEED TO ADD A BAD WORD?)

[Carlos d. M. <cg...@wo...>]

Bob Wilson escribi=F3:

> Carlos,
>
> > If you some day want to unsubscribe from this list you DON'T HAVE TO
> > SEND a message with the <<"unsubscribe me" without quotes>>, YOU HAVE=
 TO
> > GO TO THE PAGE WHERE YOU SUBSCRIBED and go to the manage subscription
> > section, and unsubscribe yourself FROM THERE.
>
> Actually, there is no "manage subscription" section. There is, however,=
 A
> division about the middle of the page entitled:

Only notice that I didn't write quotes around manage subscription, that m=
eans
I don't say that is its name, I say that is the intention of the section,
whatever its name actually is.

I have just see at it and now I give you its name, I admit that having no=
t
given it since first time is an error by me, it is called "Dev-cpp-users
Subscribers", which has a first section for the administrator, with two e=
dit
fields, and below it the section for the subscribers for manage their
subscription, where they can unsubscribe, with one edit field and a butto=
n
saying "Edit options". Perhaps this makes someone think, when they see th=
e
first part, "oh!, it's only for admin, not for subscribers", despite the =
name
of the section, before noticing there is the second part for subscribers.

It seems that people has the custom of read the first and, if there is no
sections in the text which seems to start something different, or the fir=
st
one or two sections don't start something different, to consider that
everything which follows is the same thing, and they don't read that. Tha=
t's a
bad habit which must be abandoned.

Tiny guide for reading (this phrase has no second sense, eh? if some of y=
ou
can think I am intending to say something offensive or not with this, for=
get
that, I don't say anything):
    Watch the calls to footnotes (a fail I usually found when someone rea=
ds my
texts (exams, letters...), as they are not books, usually forget that the
footnotes has not to be exclusive of books).
    The quotes are not a simple decoration, they must be used and conside=
red,
and its use or not use is completely meaningful.
    The language has many capabilities for expresion, subtleties and sayi=
ng
many, many things with short phrases, and those capabilities must be used=
 and
considered, but either you must not abuse supposing those capabilities,
sometimes it can seem that the phrase uses them, but it is not that way, =
it's
just a coincidence.

RE: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Matthew Hickson
> Sent: Sunday, July 21, 2002 2:43 AM
> To: 'Dev-C++ Mailing List'
> Subject: Re: [Dev-C++] Copy Constructors and Overloaded 
> Assignment Operators
> 
>  Another rule 
> to tag on 
> to using static members for
> callbacks.


What do you mean with that?


 
> Now, speaking of class members, how would you persist state?
> 
> In VB (the realm I come from... well, there was Pascal those many
> years ago 8-), I would use a Type (read struct) to hold my data.
> This allows for quick memory copies to restore defaults/back out
> changes... In C++ I can also see it making serialization a little
> easier (convert to a char array/string and dump to disk).
> 
> Any thoughts on alternative measures to accomplish the same?
> 
> (I'm playing with a few projects that might make use of something
> like this, but want to make sure that I'm not  starting off on the
> wrong foot...)


Well i guess you can use a reset() member function with no values stored
in disk.




Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
* Alternative URL: http://run.to/noicys

Re: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Abhijit S. <mu...@gm...>]

> Now, speaking of class members, how would you persist state?
>
> In VB (the realm I come from... well, there was Pascal those many
> years ago 8-), I would use a Type (read struct) to hold my data.
> This allows for quick memory copies to restore defaults/back out
> changes... In C++ I can also see it making serialization a little
> easier (convert to a char array/string and dump to disk).

This isn't always portable, since many compilers use memory alignment to
optimize access... Consider this:

struct foo
{
    char    bar;        // sizeof(char) is 1
    int     tender;     // sizeof(int) is 4
};

sizeof(foo) may not be 5. By default, in most 32-bit optimizing compilers
(including MingW and BC), it'll be 8, since all members are aligned on
dword-boundaries. So if you try to read in the struct using a version of the
program which has been compiled without this optimization, you won't get
what you expected. Neither will your son, when he tries reading it in from a
64-bit compiled program. A more portable way to persist is methods such as
saveToDisk() and loadFromDisk(), which read and write each member. This way
you can also change the read/write method to suit the platform... on
Windows, it can use the registry, on Linux the home dir, on DOS a config
file, etc. You could also interface to classes like FooWriter and FooReader,
to which you can pass the struct/class as an argument.

Hope this helps.

Re: [Dev-C++] YOU MUST READ THIS OR THE NEXT "UNSUBSCRIBE ME" MESSAGE AND THE ANSWERS (DO I NEED TO ADD A BAD WORD?)

[Hongli L. <h....@ch...>]

On Sun, 2002-07-21 at 07:29, Bob Wilson wrote:
> Carlos,
> 
> > If you some day want to unsubscribe from this list you DON'T HAVE TO
> > SEND a message with the <<"unsubscribe me" without quotes>>, YOU HAVE TO
> > GO TO THE PAGE WHERE YOU SUBSCRIBED and go to the manage subscription
> > section, and unsubscribe yourself FROM THERE.
> 
> Actually, there is no "manage subscription" section. There is, however, A
> division about the middle of the page entitled:
> 
> "Subscribing to Dev-cpp-users "
> 

Look at the bottom of that page.
"Dev-C++ subscribers"
"To change your subscribtion (set options bla bla...., or unsubscribe
from Dev-Cpp-users), enter your subscribtion emailaddresss".

The word "unsubscribe" is there. It's so obvious.

Re: [Dev-C++] One more time: HOW TO UNSUBSCRIBE!

[Hongli L. <h....@ch...>]

On Sun, 2002-07-21 at 07:18, Bob Wilson wrote:
> Here is your change . . .
> 
> While there is a link, it does not specifically say to follow the link to
> unsubscribe.

It does now. Or actually, since yesterday.
"TO UNSUBSCRIBE: http://www.noicys.cjb.net/devcpp/ub.htm"

Re: [Dev-C++] YOU MUST READ THIS OR THE NEXT "UNSUBSCRIBE ME" MESSAGE AND THE ANSWERS (DO I NEED TO ADD A BAD WORD?)

[Bob W. <bo...@ph...>]

Carlos,

> If you some day want to unsubscribe from this list you DON'T HAVE TO
> SEND a message with the <<"unsubscribe me" without quotes>>, YOU HAVE TO
> GO TO THE PAGE WHERE YOU SUBSCRIBED and go to the manage subscription
> section, and unsubscribe yourself FROM THERE.

Actually, there is no "manage subscription" section. There is, however, A
division about the middle of the page entitled:

"Subscribing to Dev-cpp-users "

Re: [Dev-C++] One more time: HOW TO UNSUBSCRIBE!

[Bob W. <bo...@ph...>]

> Hell, there's even a link on the bottom of the message for the list
management page....
>
>
> That's my $0.02.

Here is your change . . .

While there is a link, it does not specifically say to follow the link to
unsubscribe. Yes I know everyone should be able to figure it out, but
perhaps it would be best to include a comment with the tags added to each
message such as:

Dev-cpp-users mailing list
Dev...@li...

Subscribe or Unsubscribe
https://lists.sourceforge.net/lists/listinfo/dev-cpp-users

[Dev-C++] Bugs et al?

[Martin H. <mh@x.2y.net>]

Lo.

New to this list, but I skimmed through the archives and didn't find
answers so:

I just recently installed Dev-C++ 4.9.4.2. There are some issues I'm
having.

The first, least annoying, issue is that the auto intendation sometimes
seems to double. Ex:

	bla bla bla;
		bla bla bla;
			and so on...;

It only happens sometimes, though.

The other thing is that the debugging is a bit buggy ;)
It seems to be nearly impossible to watch variables. Sure, I can add a
name to the list, but it's not showing any value while debugging. I got
it to work once, with one variable out of three. 4.9.4.1 wasn't any
better from my brief experience.

This is a wonderful piece of software, despite these bugs.

-
Martin Henrysson
mh@x.2y.net

Re: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Matthew H. <mhi...@sy...>]

Hello Ioannis,

>To clarify things more.
>
>You passed as an argument a const object of type Test. The member
>functions of type Test that can act on a const object are only const
>member functions. This applies of course to overloaded operators too
>since they are member functions themselves (well, when you define them
>as member functions). Do not forget to always declare all the
>"read-only" member functions as const.
>You can perform some magic on const objects using the mutable keyword,
>but i do not think you have reached that level of consciousness yet. :)
>  
>
No probably not.  However, I've got enough to get me going for now. 8-)

Thanks for the explanation.  const for const... Another rule to tag on 
to using static members for
callbacks.

>Another interesting thing is that member functions of an object can
>access the private part of objects of the same type.
>
>
>So instead of that:
>
>  
>
>>// Operator =
>>Test& Test::operator=(const Test& Test2){
>>     data = Test2.getData();
>>     data2 = Test2.getData2();
>>    
>>     return *this;
>>    
>>
>
>
>you can do directly that:
>
>
>// Operator =
>Test& Test::operator=(const Test& Test2){
>      data = Test2.data;
>      data2 = Test2.data2;
>     
>      return *this;
>}
>  
>
True.  The only thing I don't like about that is that any validation 
I've put
in place doesn't get triggered.  I know by that stage in the game that
everything should be okay... but if there are some triggers (like logging,
computation, etc.... I'd lose them).  I mean, I could use an initializer 
list
too, right?  (That always seemed counter-intuitive to me though...
Decreases legibility, unless you're used to it... and same problem as
above...).

Now, speaking of class members, how would you persist state?

In VB (the realm I come from... well, there was Pascal those many
years ago 8-), I would use a Type (read struct) to hold my data.
This allows for quick memory copies to restore defaults/back out
changes... In C++ I can also see it making serialization a little
easier (convert to a char array/string and dump to disk).

Any thoughts on alternative measures to accomplish the same?

(I'm playing with a few projects that might make use of something
like this, but want to make sure that I'm not  starting off on the
wrong foot...)

>Keep coding,
>  
>
I will. 8-)

RE: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Matthew Hickson
> Sent: Sunday, July 21, 2002 12:33 AM
> To: Dev-C++ Mailing List
> Subject: Re: [Dev-C++] Copy Constructors and Overloaded 
> Assignment Operators
> 
> 
> Hello Ioannis,
> 
> Thanks!
> 
> It's been awhile. 8-)
> 
> Just what I needed.  (Well, that and a rebuild all... 8-)
> 
> Now, a little toast and jam to go with the egg on my face, and we'll 
> have a meal!


To clarify things more.

You passed as an argument a const object of type Test. The member
functions of type Test that can act on a const object are only const
member functions. This applies of course to overloaded operators too
since they are member functions themselves (well, when you define them
as member functions). Do not forget to always declare all the
"read-only" member functions as const.
You can perform some magic on const objects using the mutable keyword,
but i do not think you have reached that level of consciousness yet. :)


Another interesting thing is that member functions of an object can
access the private part of objects of the same type.


So instead of that:

> // Operator =
> Test& Test::operator=(const Test& Test2){
>      data = Test2.getData();
>      data2 = Test2.getData2();
>     
>      return *this;


you can do directly that:


// Operator =
Test& Test::operator=(const Test& Test2){
      data = Test2.data;
      data2 = Test2.data2;
     
      return *this;
}




Keep coding,

Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
* Alternative URL: http://run.to/noicys

Re: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Matthew H. <mhi...@sy...>]

Hello,

I agree that Bruce Eckel has done a great job.  I like that he's 
addressed programming
issues, aswell as "best" practices, and a little rationale as to why the 
world is the way it
is.

I've gotta get out and get a hardcopy of TIC.  The electronic version is 
nice, but a
pain to use seriously (why I tend to use other sources at the moment).

I should be okay now... we'll see. 8-)

Thanks for the pointer.
(Practical C++ Programming works along the same lines, though it's been 
around a little
while...  Worth a read if you haven't already.)

>I think the best result you'll achieve if you read Bruce Eckel
>"Thinking in C++" which you can download for free from this page:
>http://www.mindview.net/Books
>in book 1 there is entire chapter with lots of examples on copy
>contructors etc... just check it out - this book roxx...
>
>IMHO you should read carefully entire book because IMHO this is like a
>bible on C++...
>  
>

Re: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Matthew H. <mhi...@sy...>]

Hello Ioannis,

Thanks!

It's been awhile. 8-)

Just what I needed.  (Well, that and a rebuild all... 8-)

Now, a little toast and jam to go with the egg on my face, and we'll 
have a meal!

>Notice that const above.
>  
>

Re: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Zodiaq <zo...@ac...>]

Hello Matthew and all Dev-C++ users,

Saturday, July 20, 2002, 10:11:52 PM, Matthew wrote as follows:

MH> Hello guys,

Hello to u too...

[ cut... not read ]

MH> Any help would be greatly appreciated.

I think the best result you'll achieve if you read Bruce Eckel
"Thinking in C++" which you can download for free from this page:
http://www.mindview.net/Books
in book 1 there is entire chapter with lots of examples on copy
contructors etc... just check it out - this book roxx...

IMHO you should read carefully entire book because IMHO this is like a
bible on C++...

-- 
regards, Zodiaq

RE: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Matthew Hickson
> Sent: Saturday, July 20, 2002 11:12 PM
> To: Dev...@li...
> Subject: [Dev-C++] Copy Constructors and Overloaded 
> Assignment Operators
> 
> 
> Hello guys,
> 
> Just a quick question...
> 
> I'm having a rough time getting some copy constructors and overloaded 
> assignment operators to work.  I've had a look through my stuff (Ivor 
> Horton - Wrox - Beginning C++; Steve Oualline - O'Reilly - 
> Practical C++ 
> Programming), but to no avail.
> 
> I feel like I'm asking how to unsubscribe here, so please be 
> gentle... 8-)  
> (By the way, can't an Admin just set up a list filter to 
> clobber these 
> guys... )
> 
> Here's the error... (others are similar)
> 
> "passing 'const Test' as 'this' argument of 'int Test::getData()' 
> discards qualifiers
> 
> [code begins]
> // Copy Constructor
> Test::Test(const Test& TestCopy){
>      data = TestCopy.getData();
>      data2 = TestCopy.getData2();
> }
> 
> // Operator =
> Test& Test::operator=(const Test& Test2){
>      data = Test2.getData();
>      data2 = Test2.getData2();
>     
>      return *this;
> }
> [code ends]
> 
> I've tried using my set functions (what I want to do anyhow...),
> 
> i.e. this.setData(Test2.getData()); // this omitted too...
> 
> I've also tried...
> 
> data = Test2->getData();
> 
> I'm going to keep looking, but a quick pointer to a good discussion
> on this would be great (or a good discussion).
> 
> Any help would be greatly appreciated.


Assuming your data is an int x; define getData()  as:


int getData() const { return x; }


Notice that const above.


Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
* Alternative URL: http://run.to/noicys

Re: [Dev-C++] test

[Hongli L. <h....@ch...>]

On Sat, 2002-07-20 at 18:39, JAIME ESPINOSA wrote:
> > TO UNSUBSCRIBE:
> > http://www.noicys.cjb.net/devcpp/ub.htm

And it worked.

Re: [Dev-C++] PLEASE Unsubscribe

[Hongli L. <h....@ch...>]

On Sat, 2002-07-20 at 21:36, Artin Baghdasarian wrote:
> 
> Unsubscribe, Unsubscribe, one more time UNSUBSCRIBE ME.
> 

Do I have to mailbomb you or something?
http://www.noicys.cjb.net/devcpp/ub.htm

RE: [Dev-C++] PLEASE Unsubscribe

[Hongli L. <h....@ch...>]

On Sat, 2002-07-20 at 21:49, Ioannis Vranos wrote:
> Are you brain damaged? We have posted messages on how to do that as
> replies to your messages in the list. Probably you have somehow blocked
> emails from the list, so i send this reply directly to your email
> address too.
>  
>  
> The answer to your question is: http://www.noicys.cjb.net/devcpp/ub.htm
>  
>  

I already sent him an email to his address but I guess he doesn't read
that either.

Re: [Dev-C++] Unsubscribe Unsubscribe Unsubscribe

[Hongli L. <h....@ch...>]

On Sat, 2002-07-20 at 21:05, Artin Baghdasarian wrote:
> 
> Unsubscribe, Unsubscribe, one more time UNSUBSCRIBE ME.
> 

Looks like I was right the. He DOESN'T read any of the replies!

[Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Matthew H. <mhi...@sy...>]

Hello guys,

Just a quick question...

I'm having a rough time getting some copy constructors and overloaded 
assignment operators to work.  I've had a look through my stuff (Ivor 
Horton - Wrox - Beginning C++; Steve Oualline - O'Reilly - Practical C++ 
Programming), but to no avail.

I feel like I'm asking how to unsubscribe here, so please be gentle... 8-)  
(By the way, can't an Admin just set up a list filter to clobber these 
guys... )

Here's the error... (others are similar)

"passing 'const Test' as 'this' argument of 'int Test::getData()' 
discards qualifiers

[code begins]
// Copy Constructor
Test::Test(const Test& TestCopy){
     data = TestCopy.getData();
     data2 = TestCopy.getData2();
}

// Operator =
Test& Test::operator=(const Test& Test2){
     data = Test2.getData();
     data2 = Test2.getData2();
    
     return *this;
}
[code ends]

I've tried using my set functions (what I want to do anyhow...),

i.e. this.setData(Test2.getData()); // this omitted too...

I've also tried...

data = Test2->getData();

I'm going to keep looking, but a quick pointer to a good discussion
on this would be great (or a good discussion).

Any help would be greatly appreciated.

RE: [Dev-C++] PLEASE Unsubscribe

[Ioannis V. <no...@ho...>]

Are you brain damaged? We have posted messages on how to do that as
replies to your messages in the list. Probably you have somehow blocked
emails from the list, so i send this reply directly to your email
address too.
 
 
The answer to your question is: http://www.noicys.cjb.net/devcpp/ub.htm
 
 
Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
<http://www.noicys.cjb.net/> 
* Alternative URL: http://run.to/noicys

-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Artin
Baghdasarian
Sent: Saturday, July 20, 2002 10:36 PM
To: Dev...@li...
Subject: [Dev-C++] PLEASE Unsubscribe



Unsubscribe, Unsubscribe, one more time UNSUBSCRIBE ME.




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Do You Yahoo!?
Yahoo! Health <http://health.yahoo.com/>  - Feel better, live better

Re: [Dev-C++] Unsubscribe Unsubscribe Unsubscribe

[Zodiaq <zo...@ac...>]

Hello Artin and all Dev-C++ users,

Saturday, July 20, 2002, 9:05:22 PM, Artin wrote as follows:


AB> Unsubscribe, Unsubscribe, one more time UNSUBSCRIBE ME.

Damn dude, you forgot about magic word!
Do you know what is it??

hint: "plea*e"
Or maybe it is too difficult for ya??
;-]

-- 
regards, Zodiaq

[Dev-C++] PLEASE Unsubscribe

[Artin B. <ar...@ya...>]

Unsubscribe, Unsubscribe, one more time UNSUBSCRIBE ME.



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[Dev-C++] Unsubscribe Unsubscribe Unsubscribe

[Artin B. <ar...@ya...>]

Unsubscribe, Unsubscribe, one more time UNSUBSCRIBE ME.

 



---------------------------------
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Re: [Dev-C++] test

[JAIME E. <jae...@ya...>]

just a test reply
--- Hongli Lai <h....@ch...> wrote:
> just a test
> 
> 
> 
> 
>
-------------------------------------------------------
> This sf.net email is sponsored by:ThinkGeek
> Welcome to geek heaven.
> http://thinkgeek.com/sf
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> TO UNSUBSCRIBE:
> http://www.noicys.cjb.net/devcpp/ub.htm
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users

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[Dev-C++] test

[Hongli L. <h....@ch...>]

just a test