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why still use C?

no this is no trollposting and please don't get it wrong but iam very
curious why people still use C instead of other languages especially C++.

i heard people say C++ is slower than C but i can't believe that. in pieces
of the application where speed really matters you can still use "normal"
functions or even static methods which is basically the same.

in C there arent the simplest things present like constants, each struct and
enum have to be prefixed with "struct" and "enum". iam sure there is much
more.

i don't get it why people program in C and faking OOP features(functi on
pointers in structs..) instead of using C++. are they simply masochists or
is there a logical reason?

i feel C has to benefit against C++.

--
cody

[Freeware, Games and Humor]
www.deutronium.de.vu || www.deutronium.tk
--
comp.lang.c.mod erated - moderation address: cl**@plethora.n et
Nov 13 '05
687 23893
In <bn**********@t itan.btinternet .com> Richard Heathfield <do******@addre ss.co.uk.invali d> writes:
James Kuyper wrote:
Richard Heathfield <do******@addre ss.co.uk.invali d> wrote in message
news:<bn******* ***@hercules.bt internet.com>.. .
James Kuyper wrote:
<snip>
> "Correct code for that implementation" is "correct code", for that
> implementation. The fact that it's not portable doesn't make it
> incorrect.

MMMV. :-)


I don't recognize that one. Sorry.


My Mileage May Vary. (That is, I don't happen to share your opinion on the
matter of whether non-portable code is correct C code.)


Then, you're at odds with the C standard itself:

3 A program that is correct in all other aspects, operating on
correct data, containing unspecified behavior shall be a correct
program and act in accordance with 5.1.2.3.

Dan
--
Dan Pop
DESY Zeuthen, RZ group
Email: Da*****@ifh.de
Nov 13 '05 #451
In <bn**********@t itan.btinternet .com> Richard Heathfield <do******@addre ss.co.uk.invali d> writes:
Irrwahn Grausewitz wrote:
Richard Heathfield <do******@addre ss.co.uk.invali d> wrote:
Irrwahn Grausewitz wrote:

Joona I Palaste <pa*****@cc.hel sinki.fi> wrote:

>Default User <fi********@boe ing.com.invalid > scribbled the following:
>> Joona I Palaste wrote:
>>> My Mileage May Vary.
>
>> Do they still say "mileage" in the UK? Shouldn't it be kilometerage?
>
>I've been to the UK, and trust me, they're as Imperial there as the
>folks in the USA. Only difference is, the UK government pretends they're
>a metric country.

Yes, and they measure speed in furlongs per fortnight. :)

This is absolutely false. The UK has no use for such large units.


You got no snails in the UK? :)


We have snails, but not turbosnails.


You mean, British snails can't do 0.166 millimeters per second? ;-)

Dan
--
Dan Pop
DESY Zeuthen, RZ group
Email: Da*****@ifh.de
Nov 13 '05 #452
"Arthur J. O'Dwyer" <aj*@nospam.and rew.cmu.edu> writes:
On Mon, 27 Oct 2003, Fergus Henderson wrote:

** The implementation of this macro looks like it dereferences
** a null pointer, but because that code is inside sizeof(), it will
** not get executed; the compiler will instead just check that it is
** type-correct.
Chapter and verse, please.


C99 6.5.3.4 [#2]:

... If the type of the operand is a variable length array type,
the operand is evaluated; otherwise, THE OPERAND IS NOT EVALUATED ...
#define CHECK_EXPR_TYPE (expr, type) \
((void) sizeof(*(type *)NULL = (expr)))


Note that this code is not very general; it doesn't work for e.g.

CHECK_EXPR_TYPE (foo, int(*)[5]);


So use typedefs.
/*
** CAST_TO_FROM(ex pr, srctype, desttype):
** The same as EXPR cast to type DESTTYPE,
** except that it checks that the expression has a type which is
** compatible with (assignable to) SRCTYPE, forcing a compile error
** if it does not.
*/
#define CAST_FROM_TO(ex pr, srctype, desttype) \


Whoops!


Yes, there's a typo in the comment: it should be CAST_FROM_TO in both places.
Of course, this macro doesn't check whether srctype itself
is implicitly convertible to desttype, so you could use it
to "safely" convert 'double' to 'int *' if you wanted. We
can't have everything.


The macro is called CAST_FROM_TO(), not SAFE_CAST() ;-)

--
Fergus Henderson <fj*@cs.mu.oz.a u> | "I have always known that the pursuit
The University of Melbourne | of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh> | -- the last words of T. S. Garp.
Nov 13 '05 #453
[Posted to newsgroups comp.lang.c and comp.std.c, and also emailed to
the GCC mailing list <gc*@gcc.gnu.or g>.]

ku****@wizard.n et (James Kuyper) writes:
Fergus Henderson <fj*@cs.mu.oz.a u> wrote in message news:<3f******* *@news.unimelb. edu.au>...
>"E. Robert Tisdale" wrote:
>> > cat malloc89.c
>> int main(int arc, char* argv[]) {
>> char* p = malloc(10);
>> return 0;
>> }
>>
>> > gcc -Wall -std=c89 -pedantic -O2 -o malloc89 malloc89.c
>> malloc89.c: In function `main':
>> malloc89.c:2: warning: implicit declaration of function `malloc'
>> malloc89.c:2: warning: initialization makes pointer from integer
>> without a cast
>> malloc89.c:2: warning: unused variable `p'
>>
>> The "initializa tion makes pointer from integer without a cast" warning
>> is cryptic and misleading.

Yes. I don't recall whether I ever originally found such messages
confusing myself, but I have definitely witnessed other people being
confused by them.

.... The compiler should treat implicit int differently than an explicitly
declared int, and should special-case error/warning messages for conversions
from implicit int.
It did:

the warnings started with "implicit declaration of function `malloc'".
In *this particular case*, the warning about implicit function declaration
comes immediately before the cryptic warning about conversion from int,
which helps a bit.

But it doesn't help as much as it could. And it can get much worse than
this case. The two warnings are quite separate warnings, and they can
occur on different lines of code and can be separated by arbitrarily
many other warnings in between. Also, if you don't use `-Wall', then
you only get the cryptic second warning.

E.g.
char *foo() { return (char *) malloc(1); }
void bar() { return 42; }
int *baz() { return malloc(2); }

$ gcc -c a.c
a.c: In function `bar':
a.c:2: warning: `return' with a value, in function returning void
a.c: In function `baz':
a.c:3: warning: return makes pointer from integer without a cast

$ gcc -Wall -c a.c
a.c: In function `foo':
a.c:1: warning: implicit declaration of function `malloc'
a.c: In function `bar':
a.c:2: warning: `return' with a value, in function returning void
a.c: In function `baz':
a.c:3: warning: return makes pointer from integer without a cast

Many C programmers are either not aware that undeclared functions are
implicitly declared to return `int' or just don't make the connection,
and thus find the error message confusing.
That treats implicit int differently from an explicitly
declared int, and constitutes all of the special-casing that's needed
to clarify the warning about the conversion from int.


I don't agree. I think the diagnostics would be clearer if it explicitly
said that the integer mentioned in the second warning was the default
return type of the implicitly declared malloc function.

E.g.
a.c:3: warning: return makes pointer from int return value of
implicitly-declared function `malloc' without a cast

--
Fergus Henderson <fj*@cs.mu.oz.a u> | "I have always known that the pursuit
The University of Melbourne | of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh> | -- the last words of T. S. Garp.
Nov 13 '05 #454
On Wed, 29 Oct 2003 13:13:08 GMT, Fergus Henderson <fj*@cs.mu.oz.a u>
wrote:

[...]

CHECK_EXPR_TYPE (foo, int(*)[5]);


So use typedefs.


<shudder>

Typedefing arrays is _evil_.

Regards,

-=Dave
--
Change is inevitable, progress is not.
Nov 13 '05 #455
Dan Pop wrote:
In <bn**********@t itan.btinternet .com> Richard Heathfield
<do******@addre ss.co.uk.invali d> writes:
(That is, I don't happen to share your opinion on the
matter of whether non-portable code is correct C code.)


Then, you're at odds with the C standard itself:


Yes, I know. That doesn't change my opinion on this occasion.

--
Richard Heathfield : bi****@eton.pow ernet.co.uk
"Usenet is a strange place." - Dennis M Ritchie, 29 July 1999.
C FAQ: http://www.eskimo.com/~scs/C-faq/top.html
K&R answers, C books, etc: http://users.powernet.co.uk/eton
Nov 13 '05 #456
Dan Pop wrote:
In <bn**********@t itan.btinternet .com> Richard Heathfield
<do******@addre ss.co.uk.invali d> writes:

We have snails, but not turbosnails.


You mean, British snails can't do 0.166 millimeters per second? ;-)


Not the ones I've seen in the garden (*except* when my sons are "driving"
them around a home-made race-track). :-)
--
Richard Heathfield : bi****@eton.pow ernet.co.uk
"Usenet is a strange place." - Dennis M Ritchie, 29 July 1999.
C FAQ: http://www.eskimo.com/~scs/C-faq/top.html
K&R answers, C books, etc: http://users.powernet.co.uk/eton
Nov 13 '05 #457
Richard Heathfield <do******@addre ss.co.uk.invali d> wrote:
Dan Pop wrote:
You mean, British snails can't do 0.166 millimeters per second? ;-)


Not the ones I've seen in the garden (*except* when my sons are "driving"
them around a home-made race-track). :-)


Err, you don't grow, umm, 'special' plants in your garden, do you? ;-)
--
Irrwahn
(ir*******@free net.de)
Nov 13 '05 #458
Irrwahn Grausewitz <ir*******@free net.de> wrote in message news:<5h******* *************** **********@4ax. com>...
Richard Heathfield <do******@addre ss.co.uk.invali d> wrote:
Dan Pop wrote:
You mean, British snails can't do 0.166 millimeters per second? ;-)


Not the ones I've seen in the garden (*except* when my sons are "driving"
them around a home-made race-track). :-)


Err, you don't grow, umm, 'special' plants in your garden, do you? ;-)


must be the /special/ chemical fertilizers ;-)
goose,
Nov 13 '05 #459
Fergus Henderson <fj*@cs.mu.oz.a u> wrote in message news:<3f******* *@news.unimelb. edu.au>...
[Posted to newsgroups comp.lang.c and comp.std.c, and also emailed to
the GCC mailing list <gc*@gcc.gnu.or g>.]

ku****@wizard.n et (James Kuyper) writes:
Fergus Henderson <fj*@cs.mu.oz.a u> wrote in message news:<3f******* *@news.unimelb. edu.au>... ....
The compiler should treat implicit int differently than an explicitly
declared int, and should special-case error/warning messages for conversions
from implicit int.
It did:

the warnings started with "implicit declaration of function `malloc'".

.... this case. The two warnings are quite separate warnings, and they can
occur on different lines of code and can be separated by arbitrarily
many other warnings in between. ...
I learned this a long time ago, within my first year as a professional
programmer: resolve the first problem reported by your compiler,
before even bothering to look at the ones after it. The first problem
may be causing the later ones, and will often render the later
messages confusing, as it does in this case.
... Also, if you don't use `-Wall', then


.... you get what you asked for: the inadequate warnings that are the
default for that compiler.
Nov 13 '05 #460

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