RE: again a newbee question

  • From: "Sina Bahram" <sbahram@xxxxxxxxx>
  • To: <programmingblind@xxxxxxxxxxxxx>
  • Date: Wed, 13 Apr 2011 23:16:51 -0400

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 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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>>>>>>>> Thanks,
>>>>>>>> Ty
>>>>>>>>
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>>>> Thanks,
>>>> Ty
>>>>
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