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a console application in C++

i want to create a console application in C++ . what can be the 1st
step ?

NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.

Jul 16 '07 #1
24 2415
"arnuld" <ge*********@gmail.comwrote in message
news:11**********************@m37g2000prh.googlegr oups.com...
>i want to create a console application in C++ . what can be the 1st
step ?

NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.
Download a compiler.
Jul 16 '07 #2
On Jul 16, 1:34 pm, "Jim Langston" <tazmas...@rocketmail.comwrote:
"arnuld" <geek.arn...@gmail.comwrote in message
i want to create a console application in C++ . what can be the 1st
step ?
NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.
Download a compiler.

seems like you did like my question. may be it is OT but i wanted to
write a console application in C++ without using any non-standard
libraries. i already have the compiler as i have Arch GNU/Linux: GCC
4.2.1

Jul 16 '07 #3
On Jul 16, 2:07 pm, arnuld <geek.arn...@gmail.comwrote:
seems like you did like my question. may be it is OT but i wanted to
write a console application in C++ without using any non-standard
libraries. i already have the compiler as i have Arch GNU/Linux: GCC
4.2.1
i meant: "seems like you did NOT like my question. may be it is OT
but i am not sure it is OT."

Jul 16 '07 #4
On 2007-07-16 10:03, arnuld wrote:
i want to create a console application in C++ . what can be the 1st
step ?

NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.
What do you mean by console application? Roughly speaking there are two
kinds of applications, console and GUI and I don't think you've written
any GUI applications yet, which means that what you've done so far are
console applications.

If the input/output capabilities of cin/cout are not enough for your
needs you'll have to use some other, platform specific libraries since
there's nothing more advanced in standard C++. If this is what you want
ncurses might be worth looking into.

--
Erik Wikström
Jul 16 '07 #5
On Mon, 16 Jul 2007 09:07:59 +0000, arnuld wrote:
>On Jul 16, 1:34 pm, "Jim Langston" <tazmas...@rocketmail.comwrote:
"arnuld" <geek.arn...@gmail.comwrote in message
>i want to create a console application in C++ . what can be the 1st
step ?
NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.
>Download a compiler.


seems like you did like my question. may be it is OT but i wanted to
write a console application in C++ without using any non-standard
libraries. i already have the compiler as i have Arch GNU/Linux: GCC
4.2.1
What is your definition of "console application"? Is this a "console
application"? In a shell, do:

$ cat hello.cpp
#include <iostream>

int main()
{
std::cout << "Hello world" << std::endl;
}

$ g++ -std=c++98 -pedantic hello.cpp -o hello
$ ./hello
Hello world

Note: the "-std=c++98 -pedantic" flags ensure that you are compiling
according to the current C++ standard without any GCC-specific extensions/
restrictions to the language.

--
Lionel B
Jul 16 '07 #6
On Jul 16, 2:40 pm, Erik Wikström <Erik-wikst...@telia.comwrote:
On 2007-07-16 10:03, arnuld wrote:
i want to create a console application in C++ . what can be the 1st
step ?
NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.

What do you mean by console application? Roughly speaking there are two
kinds of applications, console and GUI and I don't think you've written
any GUI applications yet, which means that what you've done so far are
console applications.

If the input/output capabilities of cin/cout are not enough for your
needs you'll have to use some other, platform specific libraries since
there's nothing more advanced in standard C++. If this is what you want
ncurses might be worth looking into.
sorry , i was at fault of not being clear. actually what we see at our
colleges/universities is theoretical foundation like make a programme
do this and do that. an average student from an average university
(unlike MIT, CMU etc) reads books and does the things and when he
enters in to the real-life software work like doing a job in industry
or working directly with customers, he gets shock at first because it
is *different*. same happened with me.

i want to create some console programme, i mean, anything that can be
called practical work and but which is general and approachable enough
for a fresher like me..

any ideas on that ?

Jul 16 '07 #7
On Jul 16, 2:50 pm, Lionel B <m...@privacy.netwrote:
$ g++ -std=c++98 -pedantic hello.cpp -o hello
$ ./hello
Hello world

Note: the "-std=c++98 -pedantic" flags ensure that you are compiling
according to the current C++ standard without any GCC-specific extensions/
restrictions to the language.

Lionel, i use this.

g++ -ansi -pedantic -Wall -Wextra file.cpp

tell me if it is ok ?
Jul 16 '07 #8
On Jul 16, 2:20 pm, arnuld <geek.arn...@gmail.comwrote:
On Jul 16, 2:50 pm, Lionel B <m...@privacy.netwrote:
$ g++ -std=c++98 -pedantic hello.cpp -o hello
$ ./hello
Hello world
Note: the "-std=c++98 -pedantic" flags ensure that you are compiling
according to the current C++ standard without any GCC-specific extensions/
restrictions to the language.

Lionel, i use this.

g++ -ansi -pedantic -Wall -Wextra file.cpp

tell me if it is ok ?
if you get the binary than is ok. On the other hand, if you are using
*nix based OS, man gcc or man g++ may help.

Jul 16 '07 #9
On Mon, 16 Jul 2007 11:20:30 +0000, arnuld wrote:
>On Jul 16, 2:50 pm, Lionel B <m...@privacy.netwrote:
>$ g++ -std=c++98 -pedantic hello.cpp -o hello $ ./hello
Hello world

Note: the "-std=c++98 -pedantic" flags ensure that you are compiling
according to the current C++ standard without any GCC-specific
extensions/ restrictions to the language.


Lionel, i use this.

g++ -ansi -pedantic -Wall -Wextra file.cpp

tell me if it is ok ?
I used to use -ansi rather than -std=c++98 until it was pointed out to me
(on this ng) that -std=c++98 is probably more appropriate; ISO is an
international standardisation organisation, while ANSI is US only.

Apart from which I've actually just had a look at the GCC manual and it
doesn't say what -ansi does (if anything) for C++ - it only specifies the
ISO 1990 C standard, apparently...

--
Lionel B
Jul 16 '07 #10
On Jul 16, 4:03 am, arnuld <geek.arn...@gmail.comwrote:
i want to create a console application in C++ . what can be the 1st
step ?
You need a compiler, linker, and the standard libraries.

You need some kind of ability to produce a source file.
That can be any convenient text editor that lets you
make a text file that your compiler can accept.

But this is off topic here. You need specifics on
how to run your local program, platform, compiler, etc.
If you have *language* questions, ask away. But how to
get your compiler etc. to produce an executable is off
topic here.

Look for help files or other docs with your compiler.
Look for news groups that have your compiler's name
in their name. Google for tutorials specific to your
particular compiler and platform.
Socks

Jul 16 '07 #11
Lionel B wrote:

I used to use -ansi rather than -std=c++98 until it was pointed out
to me (on this ng) that -std=c++98 is probably more appropriate; ISO
is an international standardisation organisation, while ANSI is US
only.

Apart from which I've actually just had a look at the GCC manual and
it doesn't say what -ansi does (if anything) for C++ - it only
specifies the ISO 1990 C standard, apparently...
From the Solaris man pages:

-ansi
In C mode, support all ISO C90 programs. In C++ mode,
remove GNU extensions that conflict with ISO C++.

Brian

Jul 16 '07 #12
On Jul 16, 7:19 am, arnuld <geek.arn...@gmail.comwrote:
On Jul 16, 2:40 pm, Erik Wikström <Erik-wikst...@telia.comwrote:
On 2007-07-16 10:03, arnuld wrote:
i want to create a console application in C++ . what can be the 1st
step ?
NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.
What do you mean by console application? Roughly speaking there are two
kinds of applications, console and GUI and I don't think you've written
any GUI applications yet, which means that what you've done so far are
console applications.
If the input/output capabilities of cin/cout are not enough for your
needs you'll have to use some other, platform specific libraries since
there's nothing more advanced in standard C++. If this is what you want
ncurses might be worth looking into.

sorry , i was at fault of not being clear. actually what we see at our
colleges/universities is theoretical foundation like make a programme
do this and do that. an average student from an average university
(unlike MIT, CMU etc) reads books and does the things and when he
enters in to the real-life software work like doing a job in industry
or working directly with customers, he gets shock at first because it
is *different*. same happened with me.
What the hell are you on about? This comes off like the rantings of a
madman
i want to create some console programme, i mean, anything that can be
called practical work and but which is general and approachable enough
for a fresher like me..

any ideas on that ?
Sure. The first is that you aren't going to get anywhere writing
vague and incomprehensible questions in a newsgroup. If you want to
write a program then write one. Do the exercises in a textbook.
Solve a problem. Or, if you're beyond more trivial matters and yearn
for something more like real-world experience, find an open source
project. There are plenty of places where open source apps can be
found. Start with a smaller one, and get familiar with the code --
add a feature, fix a bug, whatever.

Jul 16 '07 #13
On Jul 16, 11:05 pm, jjds...@yahoo.com wrote:
On Jul 16, 7:19 am, arnuld <geek.arn...@gmail.comwrote:
On Jul 16, 2:40 pm, Erik Wikström <Erik-wikst...@telia.comwrote:
On 2007-07-16 10:03, arnuld wrote:
i want to create a console application in C++ . what can be the 1st
step ?
NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.
What do you mean by console application? Roughly speaking there are two
kinds of applications, console and GUI and I don't think you've written
any GUI applications yet, which means that what you've done so far are
console applications.
If the input/output capabilities of cin/cout are not enough for your
needs you'll have to use some other, platform specific libraries since
there's nothing more advanced in standard C++. If this is what you want
ncurses might be worth looking into.
sorry , i was at fault of not being clear. actually what we see at our
colleges/universities is theoretical foundation like make a programme
do this and do that. an average student from an average university
(unlike MIT, CMU etc) reads books and does the things and when he
enters in to the real-life software work like doing a job in industry
or working directly with customers, he gets shock at first because it
is *different*. same happened with me.

What the hell are you on about? This comes off like the rantings of a
madman
i want to create some console programme, i mean, anything that can be
called practical work and but which is general and approachable enough
for a fresher like me..
any ideas on that ?

Sure. The first is that you aren't going to get anywhere writing
vague and incomprehensible questions in a newsgroup. If you want to
write a program then write one. Do the exercises in a textbook.
Solve a problem. Or, if you're beyond more trivial matters and yearn
for something more like real-world experience, find an open source
project. There are plenty of places where open source apps can be
found. Start with a smaller one, and get familiar with the code --
add a feature, fix a bug, whatever.
TROLL alert....

*PLONK*

Jul 16 '07 #14
arnuld wrote:
i want to create a console application in C++ . what can be the 1st
step ?
Find a problem that your program should solve. Without a problem, it is hard
to tell whether the program is correct/useful.
NOTE: i did use Google but that gives me some VC++ based links using
non-standard libraries.
Which libraries you will need is something to be determined once you know
what you want the program to do.
Best

Kai-Uwe Bux
Jul 16 '07 #15
On Mon, 16 Jul 2007 17:41:01 +0000, Default User wrote:
Lionel B wrote:

>I used to use -ansi rather than -std=c++98 until it was pointed out to
me (on this ng) that -std=c++98 is probably more appropriate; ISO is an
international standardisation organisation, while ANSI is US only.

Apart from which I've actually just had a look at the GCC manual and it
doesn't say what -ansi does (if anything) for C++ - it only specifies
the ISO 1990 C standard, apparently...

From the Solaris man pages:

-ansi
In C mode, support all ISO C90 programs. In C++ mode, remove
GNU extensions that conflict with ISO C++.
Right, just found that. So it seems that for C++ -ansi *is* actually
equivalent to -std=c++98. Well... according to the docs, the g++ default
is -std=gnu++98' which is "the same as -std=c++98 plus GNU extensions".
So I guess if you remove those extensions you're left with -std=c++98. Or
am I missing some subtlety here?

Upshot is I think I'll stick with the more straightforward "specify the
actual standard you want" approach; i.e. -std=c++98

Oh, and I'm told you need -pedantic too for strict standards-
compliance... now *that* has without doubt the most confusing man entry I
have ever seen. Ever.

--
Lionel B
Jul 16 '07 #16

arnuld <ge*********@gmail.comwrote in message...
On Jul 16, 11:05 pm, jjds...@yahoo.com wrote:
/* """
i want to create some console programme, i mean, anything that can be
called practical work and but which is general and approachable enough
for a fresher like me..
any ideas on that ?

Sure. The first is that you aren't going to get anywhere writing
vague and incomprehensible questions in a newsgroup. If you want to
write a program then write one. Do the exercises in a textbook.
Solve a problem. Or, if you're beyond more trivial matters and yearn
for something more like real-world experience, find an open source
project. There are plenty of places where open source apps can be
found. Start with a smaller one, and get familiar with the code --
add a feature, fix a bug, whatever.
TROLL alert....

*PLONK*
""" */

Troll?!?!? Look who's calling the kettle black!!

(hint: You've been given simple example(s), but, you keep asking the same
question. That's what 'Trolls' do!)

Show what *you* have done, and explain what problem you have with it.

Whether it's a 'console' or 'GUI' is the compilers function, not 'C++'.
I put 'console apps' in a 'class', and instantiate(run) them in wxWidgets (a
GUI), to try/test them. That has nothing to do with 'C++' (though it's coded
in 'C++'. <G>).

--
Bob R
POVrookie
Jul 16 '07 #17
On Jul 17, 4:25 am, "BobR" <removeBadB...@worldnet.att.netwrote:
arnuld <geek.arn...@gmail.comwrote in message...
TROLL alert....

*PLONK*
""" */

Troll?!?!? Look who's calling the kettle black!!
BobR, a little search will tell you why i called "jj*****@yahoo.com" a
troll. i am posting here from some time. did i call anyone a troll
till yet, except "jj*****@yahoo.com"
???
(hint: You've been given simple example(s), but, you keep asking the same
question. That's what 'Trolls' do!)
ok , then call me a troll and *PLONK* me if you love to do so.
Show what *you* have done, and explain what problem you have with it.

Whether it's a 'console' or 'GUI' is the compilers function, not 'C++'.
I put 'console apps' in a 'class', and instantiate(run) them in wxWidgets (a
GUI), to try/test them. That has nothing to do with 'C++' (though it's coded
in 'C++'. <G>).
well, thanks but i will not try GUIs, ATM, i will focus on creating
classes.

Jul 17 '07 #18
On Jul 16, 1:20 pm, arnuld <geek.arn...@gmail.comwrote:
On Jul 16, 2:50 pm, Lionel B <m...@privacy.netwrote:
$ g++ -std=c++98 -pedantic hello.cpp -o hello
$ ./hello
Hello world
Note: the "-std=c++98 -pedantic" flags ensure that you are compiling
according to the current C++ standard without any GCC-specific extensions/
restrictions to the language.
Lionel, i use this.
g++ -ansi -pedantic -Wall -Wextra file.cpp
tell me if it is ok ?
You probably want to add "-D_GLIBCXX_CONCEPT_CHECKS
-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC", to catch illegal
use of the library.

--
James Kanze (GABI Software) email:ja*********@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34
Jul 17 '07 #19
On Jul 17, 12:24 am, Lionel B <m...@privacy.netwrote:
On Mon, 16 Jul 2007 17:41:01 +0000, Default User wrote:
Lionel B wrote:
I used to use -ansi rather than -std=c++98 until it was pointed out to
me (on this ng) that -std=c++98 is probably more appropriate; ISO isan
international standardisation organisation, while ANSI is US only.
Apart from which I've actually just had a look at the GCC manual and it
doesn't say what -ansi does (if anything) for C++ - it only specifies
the ISO 1990 C standard, apparently...
From the Solaris man pages:
-ansi
In C mode, support all ISO C90 programs. In C++ mode, remove
GNU extensions that conflict with ISO C++.
Right, just found that. So it seems that for C++ -ansi *is* actually
equivalent to -std=c++98.
At present. What will it mean when they also support
-std=c++03?

--
James Kanze (GABI Software) email:ja*********@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

Jul 17 '07 #20
On Jul 16, 1:19 pm, arnuld <geek.arn...@gmail.comwrote:

[...]
i want to create some console programme,
The problem is that the concept of a console program (as opposed
to some other type of program) is purely Windows. On most
systems, a program is a program, and C++ doesn't make any real
distinction.

--
James Kanze (GABI Software) email:ja*********@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

Jul 17 '07 #21
On Tue, 17 Jul 2007 09:59:42 +0000, James Kanze wrote:
On Jul 16, 11:50 am, Lionel B <m...@privacy.netwrote:
>On Mon, 16 Jul 2007 09:07:59 +0000, arnuld wrote:

[...]
>Note: the "-std=c++98 -pedantic" flags ensure that you are compiling
according to the current C++ standard without any GCC-specific
extensions/ restrictions to the language.

Note that the "-std=c++98 -pedantic" flags only affect the compiler, and
do *not* ensure that you are not including non-standard headers or
linking against non-standard libraries.
No indeed, they only specify the *language* standard that the compiler
should respect.

[...]

To summarise: the only way to ensure that you are not including non-
standard headers or linking against non-standard libraries is ... don't
include non-standard headers and don't link against non-standard
libraries.

--
Lionel B
Jul 17 '07 #22
On Tue, 17 Jul 2007 10:07:24 +0000, James Kanze wrote:
On Jul 17, 12:24 am, Lionel B <m...@privacy.netwrote:
>On Mon, 16 Jul 2007 17:41:01 +0000, Default User wrote:
Lionel B wrote:
>I used to use -ansi rather than -std=c++98 until it was pointed out
to me (on this ng) that -std=c++98 is probably more appropriate; ISO
is an international standardisation organisation, while ANSI is US
only.
>Apart from which I've actually just had a look at the GCC manual and
it doesn't say what -ansi does (if anything) for C++ - it only
specifies the ISO 1990 C standard, apparently...
From the Solaris man pages:
-ansi
In C mode, support all ISO C90 programs. In C++ mode,
remove GNU extensions that conflict with ISO C++.
>Right, just found that. So it seems that for C++ -ansi *is* actually
equivalent to -std=c++98.

At present. What will it mean when they also support -std=c++03?
Who knows? Maybe then the g++ default will be -std=gnu++03' which will be
the same as -std=c++03 plus GNU extensions and if -ansi removes those
extensions you'll be left with -std=c++03?

Maybe they should have a flag -std=c++latest-supported (and then make
that the sodding default, rather than forcing you to mess about to get
standard behaviour).

--
Lionel B
Jul 17 '07 #23
On Jul 17, 12:21 pm, Lionel B <m...@privacy.netwrote:
On Tue, 17 Jul 2007 10:07:24 +0000, James Kanze wrote:
On Jul 17, 12:24 am, Lionel B <m...@privacy.netwrote:
On Mon, 16 Jul 2007 17:41:01 +0000, Default User wrote:
Lionel B wrote:
Who knows? Maybe then the g++ default will be -std=gnu++03' which will be
the same as -std=c++03 plus GNU extensions and if -ansi removes those
extensions you'll be left with -std=c++03?
But perhaps for some older code, you'll still want -std=c++98.
I sort of suspect that this option was introduced for C, where
some people definitely only want C90, where as gcc tries to
support C99. The point is, you have a choice.
Maybe they should have a flag -std=c++latest-supported (and then make
that the sodding default, rather than forcing you to mess about to get
standard behaviour).
That sounds like a very good idea---why don't you propose it to
them. Adding a "-std=<lang>-latest" option sounds like a simple
and obvious improvement. With regards to the default: from what
I can tell, the C++ group are moving in the direction of
deprecating (and perhaps sometime eliminating) the GNU
extensions, so the number of extensions you get is going down.
What's really missing is:
-- that the option also affect the library, and
-- options for other standards, like Posix.
(I would expect that the default on a Unix machine also include
-std=posix<version>. Even when that contradicts -std=c++98.)
The problem with this is that on most platforms, the library, or
at least the C part of it) is beyond the reach of g++ itself.
The best the OS option could do is set the appropriate -D
options and (if necessary) the library path.

--
James Kanze (GABI Software) email:ja*********@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

Jul 18 '07 #24
On Jul 17, 12:10 pm, Lionel B <m...@privacy.netwrote:
On Tue, 17 Jul 2007 09:59:42 +0000, James Kanze wrote:
On Jul 16, 11:50 am, Lionel B <m...@privacy.netwrote:
On Mon, 16 Jul 2007 09:07:59 +0000, arnuld wrote:
[...]
Note: the "-std=c++98 -pedantic" flags ensure that you are compiling
according to the current C++ standard without any GCC-specific
extensions/ restrictions to the language.
Note that the "-std=c++98 -pedantic" flags only affect the compiler, and
do *not* ensure that you are not including non-standard headers or
linking against non-standard libraries.
No indeed, they only specify the *language* standard that the compiler
should respect.
The "International Standard: Programming Languages -- C++",
ISO:IEC 14882 also defines what we traditionally would call a
library. From the point of view of the standard, the library is
part of the language (and is certainly part of the language
standard).
[...]
To summarise: the only way to ensure that you are not including non-
standard headers or linking against non-standard libraries is ... don't
include non-standard headers and don't link against non-standard
libraries.
Yup.

There are a lot of other bad practices that the compiler will
accept as well. (Things like indirectly returning a reference
to a local variable, for example.) Specifying "-std=c++98
-pendantic" is very useful. So are "-D_GLIBCXX_CONCEPT_CHECKS
-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC". But you still need
good code review.

--
James Kanze (GABI Software) email:ja*********@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

Jul 18 '07 #25

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### Vandf component communication method one: data sharing ​ Vandf components can achieve data exchange through data sharing, state sharing, events, and other methods. Vandf's data exchange method...
2
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 7 Feb 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:30 (7.30PM). In this month's session, the creator of the excellent VBE...
0
by: fareedcanada | last post by:
Hello I am trying to split number on their count. suppose i have 121314151617 (12cnt) then number should be split like 12,13,14,15,16,17 and if 11314151617 (11cnt) then should be split like...
0
Git
by: egorbl4 | last post by:
Скачал я git, хотел начать настройку, а там вылезло вот это Что это? Что мне с этим делать? ...
1
by: davi5007 | last post by:
Hi, Basically, I am trying to automate a field named TraceabilityNo into a web page from an access form. I've got the serial held in the variable strSearchString. How can I get this into the...
0
by: MeoLessi9 | last post by:
I have VirtualBox installed on Windows 11 and now I would like to install Kali on a virtual machine. However, on the official website, I see two options: "Installer images" and "Virtual machines"....
0
by: Aftab Ahmad | last post by:
Hello Experts! I have written a code in MS Access for a cmd called "WhatsApp Message" to open WhatsApp using that very code but the problem is that it gives a popup message everytime I clicked on...
0
by: Aftab Ahmad | last post by:
So, I have written a code for a cmd called "Send WhatsApp Message" to open and send WhatsApp messaage. The code is given below. Dim IE As Object Set IE =...

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