RE: again a newbee question

  • From: "Sina Bahram" <sbahram@xxxxxxxxx>
  • To: <programmingblind@xxxxxxxxxxxxx>
  • Date: Thu, 14 Apr 2011 11:13:29 -0400

I'm with Chris on this one. No problem.

See, we're even agreeing.

Take care,
Sina

-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Christopher Coale
Sent: Thursday, April 14, 2011 10:38 AM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: again a newbee question

Sigh.. nobody is being confrontational. I was not even intending to be 
rude. And what are you talking about with the programmer's version of 
"my car is bigger than yours"? I just used my game engine as an example 
-- I didn't give a name of it or even a link, so I was not advertising. 
If you're referring to "What the hell are you talking about?" Why on 
earth would someone take that personally? I asked what he is talking 
about.. god forbid someone use a word such as "hell" for emphasis on 
confusion.

Have a good day,
Christopher

On 4/14/2011 12:46 AM, Holdsworth, Lynn wrote:
> This thread was really interesting until it became confrontational. Is
> this the programmers' version of "my car's bigger than yours"? Please
> try to bite your tongues and stop insulting one another. "What the hell
> are you talking about" should never be a part of any message on here. Is
> this list being moderated?
>
> Cheers, Lynn
>
> -----Original Message-----
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Christopher
> Coale
> Sent: 14 April 2011 04:34
> To: programmingblind@xxxxxxxxxxxxx
> Subject: Re: again a newbee question
>
> Now what are you talking about? My game engine has a scene graph of
> inherited nodes (sometimes 3 or 4 deep) that all get allocated and
> destroyed, with the destructors called in the proper order? So again,
> what the hell are you talking about? By the way, I never call "exit" in
> it nor do I register callbacks to destroy nodes using the atexit
> function. And 32 callbacks is slightly limiting, wouldn't you say?
>
> As for what Tyler said, and it totally emphasized my point, was how
> exactly do you want these callbacks to destroy resources? Shall we store
> global pointers to the resources so that the callback can access them?
> Here is what I mean:
>
> class SomeGraphicsClass {
> IDirect3DVertexBuffer9 *pVB = .....; // assume this is a created
> resource };
>
> void myOnExit()
> {
>          // ok.. now how do I destroy pVB?
> }
>
> On 4/13/2011 8:29 PM, Sina Bahram wrote:
>> I don't see how that's the same thing though.
>>
>> That's platform specific, no? i could be totally off on that point,
> but I thought it was.
>> This allows you to register 32 callbacks, and all your objects have
>> destructors which get called by parents, etc, etc, so you should be
> good to go.
>> Of course destructors of large object trees is a joke in C++, as
>> anyone who has had to deal with multiple inherited classes and
>> destructor order resolution issues will tell you. throw in some
> virtual functions on top of that, and the only thing you'll be
> destroying reliably is a bottle of something.
>> Take care,
>> Sina
>>
>> -----Original Message-----
>> From: programmingblind-bounce@xxxxxxxxxxxxx
>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Ken Perry
>> Sent: Wednesday, April 13, 2011 11:25 PM
>> To: programmingblind@xxxxxxxxxxxxx
>> Subject: RE: again a newbee question
>>
>> I think Chris wants people to use the onDestroy stuff but in truth
>> OnDestroy is not going to free up nothing if the person doesn't' add
>> the code to it so I figure it doesn't matter either way.
>>
>> Ken
>>
>> -----Original Message-----
>> From: programmingblind-bounce@xxxxxxxxxxxxx
>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Sina
>> Bahram
>> Sent: Wednesday, April 13, 2011 11:20 PM
>> To: programmingblind@xxxxxxxxxxxxx
>> Subject: RE: again a newbee question
>>
>> Here:
>>
>> void exit ( int status );
>>
>> Terminates the process normally, performing the regular cleanup for
>> terminating processes.
>>
>> First, all functions registered by calls to atexit are executed in the
>> reverse order of their registration. Then, all streams are closed and
>> the temporary files deleted, and finally the control is returned to
>> the host environment.
>>
>> The status argument is returned to the host environment.
>>
>> http://www.cplusplus.com/reference/clibrary/cstdlib/exit/
>>
>> and here:
>>
>> int atexit ( void ( * function ) (void) ); Set function to be executed
>> on exit
>>
>> The function pointed by the function pointer argument is called when
>> the program terminates normally.
>>
>> If more than one atexit function has been specified by different calls
>> to this function, they are all executed in reverse order as a stack,
>> i.e. the last function specified is the first to be executed at exit.
>>
>> One single function can be registered to be executed at exit more than
> once.
>> C++ implementations are required to support the registration of at
>> C++ least 32
>> atexit functions.
>>
>> http://www.cplusplus.com/reference/clibrary/cstdlib/atexit/
>>
>> take care,
>> Sina
>>
>> -----Original Message-----
>> From: Sina Bahram [mailto:sbahram@xxxxxxxxx]
>> Sent: Wednesday, April 13, 2011 11:17 PM
>> To: 'programmingblind@xxxxxxxxxxxxx'
>> Subject: RE: again a newbee question
>>
>>
>> I'd recommend looking up how exit works.
>>
>> Take care,
>> Sina
>> -----Original Message-----
>> From: programmingblind-bounce@xxxxxxxxxxxxx
>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of
>> Christopher Coale
>> Sent: Wednesday, April 13, 2011 11:06 PM
>> To: programmingblind@xxxxxxxxxxxxx
>> Subject: Re: again a newbee question
>>
>> Also, just because exit() cleans up some standard system resources,
>> does not mean it cleans up ALL resources. I do most of my programming
>> with XNA, Direct3D, and the like. When you create objects that exist
>> in graphics memory instead of RAM, you are responsible for managing
>> that object. If I create a vertex buffer on the GPU, I am responsible
>> for freeing that resource, not the "exit" function.
>>
>> Teaching beginner programmers to call exit to leave the program is
>> just simply a horrible decision. But hey, what do I know..
>>
>> On 4/13/2011 7:41 PM, Sina Bahram wrote:
>>> I don't understand what that means.
>>>
>>> Totally destroys what structure?
>>>
>>> It's an exit ... of course it destroys everything.
>>>
>>> Furthermore, exit is an extremely clean way of exiting a program.
>>> It's a
>> million times better than return 0.
>>> It actually calls, in reverse order of course, all functions which
>> registered via atexit. It also closes streams, not only IO ones
>>> for that matter, and it gets rid of/cleans temporary files.
>>>
>>> Quite puzzled ...
>>>
>>> Take care,
>>> Sina
>>>
>>> -----Original Message-----
>>> From: programmingblind-bounce@xxxxxxxxxxxxx
>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of
>> Christopher Coale
>>> Sent: Wednesday, April 13, 2011 9:38 PM
>>> To: programmingblind@xxxxxxxxxxxxx
>>> Subject: Re: again a newbee question
>>>
>>> Alright, I just wanted to force you to clarify, so you don't give
>>> Ashish the wrongi dea. ;) I grade C++ programming assignments, and I
>>> see new
>>> C++ programmers using the exit function simply because it's
>>> C++ convenient,
>>> but it totally destroys the structure.
>>>
>>> On 4/13/2011 6:35 PM, Ken Perry wrote:
>>>> Well I was using exit as a concept more than a method since
>>>> depending on
>> the
>>>> gui you code in there are things like finish, exit, delete and all
>>>> kinds
>> of
>>>> way to make a program die.
>>>>
>>>> Ken
>>>>
>>>> -----Original Message-----
>>>> From: programmingblind-bounce@xxxxxxxxxxxxx
>>>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of
>>>> Christopher Coale
>>>> Sent: Wednesday, April 13, 2011 9:28 PM
>>>> To: programmingblind@xxxxxxxxxxxxx
>>>> Subject: Re: again a newbee question
>>>>
>>>> Careful with saying "until you call exit." You don't want to give
>>>> the impression that the exit() function is okay in a structured
>>>> program, do we? ;)
>>>>
>>>> On 4/13/2011 6:25 PM, Ken Perry wrote:
>>>>> Nod you will not need things like scanf and getch and things of the
>>>>> like when you get into serious coding because you will be probably
>>>>> building windows apps of some kind and the window will remain open
>>>>> till you call exit.  This is just while you're learning so feel
>>>>> free to use scanf,
>>>> getch,
>>>>> getchar, or any of the things like read to just hold the program
>>>>> till
>> your
>>>>> ready to close.
>>>>>
>>>>> Ken
>>>>>
>>>>> -----Original Message-----
>>>>> From: programmingblind-bounce@xxxxxxxxxxxxx
>>>>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of ashish
>> rohtagi
>>>>> Sent: Wednesday, April 13, 2011 9:05 PM
>>>>> To: programmingblind@xxxxxxxxxxxxx
>>>>> Subject: Re: again a newbee question
>>>>>
>>>>> sorry, I corrected the mistake about printf and scanf. thanks for
>>>>> the advice. take care, regards. ashish
>>>>>
>>>>> On 4/14/11, Littlefield, Tyler<tyler@xxxxxxxxxxxxx>      wrote:
>>>>>> I'm sorry, getch should be getchar. Also: it's fairly bad coding
>>>>>> style to put a printf on the same line as a scanf. Unless you have
>>>>>> good reason, try to keep your code separated. It makes it easier
>>>>>> to read and people don't miss things quite as easily.
>>>>>> On 4/13/2011 6:50 PM, ashish rohtagi wrote:
>>>>>>> like this?? #include<stdio.h>
>>>>>>>
>>>>>>> int main()
>>>>>>> {
>>>>>>> char me[20];
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> printf("What is your name?"); scanf("%s",&me); printf("Darn glad
>>>>>>> to meet you, %s!\n",me);
>>>>>>>
>>>>>>> scanf("s%",&me);
>>>>>>>
>>>>>>> return(0);
>>>>>>> } but result is still the same. can I use getch fungtion? if yes
>>>>>>> please tell me how to use it . take care, regards.
>>>>>>>
>>>>>>>
>>>>>>> On 4/14/11, Jared Wright<wright.jaredm@xxxxxxxxx>       wrote:
>>>>>>>> It goes right between the last printf statement and the return
>>>>>>>> statement. It's job is to hold the program open at the end, so
>>>>>>>> it
>>>> should
>>>>>>>> be the last statement before return, which ends the program.
>>>>>>>> On 4/13/2011 12:09 PM, ashish rohtagi wrote:
>>>>>>>>> hi Tyler, thanks for your suggestion, but I am unable to
>>>>>>>>> understand where to put second scanf. will you just once show
>>>>>>>>> me? take care, regards. ashish
>>>>>>>>>
>>>>>>>>> On 4/13/11, Littlefield, Tyler<tyler@xxxxxxxxxxxxx>
> wrote:
>>>>>>>>>> Like ken said, use scanf to catch it before the window closes,
>>>>>>>>>> or
>> run
>>>>>>>>>> it
>>>>>>>>>> in a command line. Here's what's happening:
>>>>>>>>>> You open the process, and the first scanf call blocks; that is
>>>>>>>>>> to
>>>> say,
>>>>>>>>>> it will not process anything, it is simply waiting for the
>>>>>>>>>> user to input something. But after it's done printing, there
>>>>>>>>>> is no reason why it should stay open because you don't tell it
>>>>>>>>>> to. So run from the
>>>> command
>>>>>>>>>> prompt, use getch() to let you hit enter before it closes or
>>>>>>>>>> use another scanf.
>>>>>>>>>> On 4/13/2011 9:32 AM, ashish rohtagi wrote:
>>>>>>>>>>> friends, thanks for all the  encouragement. here is my
>>>>>>>>>>> problem, I
>>>>> want
>>>>>>>>>>> to use scanf fungtion. in input and output but as soon as I
>>>>>>>>>>> give
>> my
>>>>>>>>>>> input and press enter the window disappears. it does not give
>> output
>>>>>>>>>>> based on my input. here is the code. #include<stdio.h>
>>>>>>>>>>>
>>>>>>>>>>> int main()
>>>>>>>>>>> {
>>>>>>>>>>> char me[20];
>>>>>>>>>>>
>>>>>>>>>>> printf("What is your name?"); scanf("%s",&me); printf("Glad
>>>>>>>>>>> to meet you, %s!\n",me); return(0); }
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On 4/13/11, Littlefield, Tyler<tyler@xxxxxxxxxxxxx>
> wrote:
>>>>>>>>>>>> O. oops. In my defense, I haven't found coffee. :) On
>>>>>>>>>>>> 4/13/2011 7:46 AM, Jared Wright wrote:
>>>>>>>>>>>>> It's there, just on the same line as the printf statement.
>>>>>>>>>>>>> On 4/13/2011 9:35 AM, Littlefield, Tyler wrote:
>>>>>>>>>>>>>> good job on using int main, just don't forget a return 0;
>>>>>>>>>>>>>> when
>>>> you
>>>>>>>>>>>>>> are
>>>>>>>>>>>>>> done. between the printf and the closing brace.
>>>>>>>>>>>>>> On 4/13/2011 6:36 AM, ashish rohtagi wrote:
>>>>>>>>>>>>>>> here is my code it compiles correctly but text just shows
>>>>>>>>>>>>>>> on
>> the
>>>>>>>>>>>>>>> screen for 1 second, I want it to stay. #include<stdio.h>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> int main()
>>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>> printf("I will learn programming!\n"); return(0); }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On 4/13/11, DaShiell, Jude T. CIV NAVAIR 1490, 1, 26
>>>>>>>>>>>>>>> <jude.dashiell@xxxxxxxx>         wrote:
>>>>>>>>>>>>>>>> You didn't put your printf statement in your message,
> but let
>>>> me
>>>>>>>>>>>>>>>> make a
>>>>>>>>>>>>>>>> guess. You didn't put a (\n) in before the closing quote
> mark
>>>> so
>>>>>>>>>>>>>>>> you
>>>>>>>>>>>>>>>> just put text on the screen without a line ending. That
> could
>>>> be
>>>>>>>>>>>>>>>> one
>>>>>>>>>>>>>>>> contributing factor. Another might be you didn't put an
>>>> #include
>>>>>>>>>>>>>>>> <stdio.h>         statement in at the top of your program
> and
>> maybe
>>>>>>>>>>>>>>>> used
>>>>>>>>>>>>>>>> #include<conio.h>. If that's the case, don't use printf
> with
>>>>>>>>>>>>>>>> conio.h
>>>>>>>>>>>>>>>> unless you also include stdio.h. For conio.h, cprintf is
> the
>>>>>>>>>>>>>>>> function
>>>>>>>>>>>>>>>> you want. Hope this helps.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -----Original Message-----
>>>>>>>>>>>>>>>> From: programmingblind-bounce@xxxxxxxxxxxxx
>>>>>>>>>>>>>>>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf
> Of
>>>>>>>>>>>>>>>> ashish
>>>>>>>>>>>>>>>> rohtagi
>>>>>>>>>>>>>>>> Sent: Wednesday, April 13, 2011 8:04
>>>>>>>>>>>>>>>> To: programmingblind@xxxxxxxxxxxxx
>>>>>>>>>>>>>>>> Cc: punitdiwan@xxxxxxxxx
>>>>>>>>>>>>>>>> Subject: again a newbee question
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> friends, sorry here I am with another foolish question,
> sorry
>>>>> but
>>>>>>>>>>>>>>>> here
>>>>>>>>>>>>>>>> is no one to teach and I am learning myself. when I
> print any
>>>>>>>>>>>>>>>> text
>>>>>>>>>>>>>>>> on
>>>>>>>>>>>>>>>> screen using printf it quickly disappears. what should I
> do
>>>> that
>>>>>>>>>>>>>>>> it
>>>>>>>>>>>>>>>> should stay? take care, regards. ashish
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>>>>>>>>>>>> Thanks,
>>>>>>>>>>>> Ty
>>>>>>>>>>>>
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>>>>>>
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