why array can't be assigned, like structs?
Mar 8 '07
57  3269 
On Fri, 09 Mar 2007 17:05:49 -0800, in comp.lang.c , Keith Thompson
<ks***@mib.orgw rote:
>Mark McIntyre <ma**********@s pamcop.netwrite s:
>On Thu, 08 Mar 2007 17:31:40 -0800, in comp.lang.c , Keith Thompson
<ks***@mib.org wrote:
Yes, it would have been clearer. It would also have been correct,
which your original statement quite simply was not.
My original statement was absolutely correct, An array is a derived
type.
--
Mark McIntyre
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan
On Mar 10, 12:05 pm, Mark McIntyre <markmcint...@s pamcop.netwrote :
On 9 Mar 2007 16:03:04 -0800, in comp.lang.c , "Harald van D?k"
<true...@gmail. comwrote:
You claimed that array assignment /has/ to be disallowed, because
arrays are derived types. Yevgen Muntyan's example disproved this.
No I didn't. I said that an array was a derived type, not a simple
type and has different behaviour.
***********>Mar k McIntyre <markmcint...@s pamcop.netwrite s:
On 8 Mar 2007 11:01:30 -0800, in comp.lang.c , buuuu...@gmail. com
wrote:
[un-snip start]
why? what's the reason? why array's cant be like any other type in C?
why it have to be different?
[un-snip end]
>
An array isn't a type. Its a derived type, and has different
behaviour. Similarly structs.
***********
You snipped too much. You claimed that an array isn't a type, and that
that is the reason it has to be different. If others don't read your
reply as an answer to the question (as "Because an array isn't a
type.") though, I'll admit I'm wrong on that part.
(snippage)
I'm curious as to how that answers my question above.
It doesn't, because your question was not relevant,
My point was that derived types have different behaviour to simple
types, and so you cannot assume that simple assignment will be
possible. I gave an example showing how you cannot assign to a struct
using a method that other languages support, and indeed C allows you
to use to /initialise/ a struct (and indeed an array).
And I showed that you /can/ assign to a struct using that same method.
The syntax is different from initialisation, but I also showed that
the syntax for initialising and assigning to basic types
(specifically, int) differs as well, so how did you read that as a
difference between structures and basic types?
Richard Heathfield wrote:
Default User said:
Richard Heathfield wrote:
Default User said:
<http://groups.google.c om/support/bin/topic.py?topic= 9246>
What would Google know about newsgroups?
He's a Google user, he ought to be at least familiar with their help
section.
Yeah. What he might not realise from reading Google's help pages is
that newsgroups are not a Google product, but a well-established
on-line society to which Google has attached itself like a remora.
Did you actually READ the link I provided?
"What is a Usenet Newsgroup?
Usenet is an online bulletin board system that began at Duke University
in 1979. Usenet users can post messages to newsgroups that can be read
(and responded to) by anyone who has access to the system through a
newsreader. Over the years, the number of newsgroups has grown into the
thousands, hosted all over the world and covering every conceivable
topic.
Google Groups contains the world's most comprehensive archive of Usenet
postings, dating back to 1981. Google Groups eliminates the need for a
newsreader and lets you search this archive the same way you'd search
on the web. You can also use Google Groups to post your own comments to
an existing Usenet newsgroup."
Nor will he learn that Google behaves irresponsibly by refusing to
clamp down on Usenet abuse perpetrated via their servers.
That's a different story.
Brian
Mark McIntyre <ma**********@s pamcop.netwrite s:
On Fri, 09 Mar 2007 17:05:49 -0800, in comp.lang.c , Keith Thompson
<ks***@mib.orgw rote:
>>Mark McIntyre <ma**********@s pamcop.netwrite s:
>>On Thu, 08 Mar 2007 17:31:40 -0800, in comp.lang.c , Keith Thompson
<ks***@mib.or gwrote:
Yes, it would have been clearer. It would also have been correct,
which your original statement quite simply was not.
My original statement was absolutely correct, An array is a derived
type.
That part of your original statement, in the second sentence, was
correct (except for the grammatical error of "its"). The problem
was with the first sentence. Here, let me present it again:
Mark McIntyre <ma**********@s pamcop.netwrite s:
An array isn't a type. Its a derived type, and has different
behaviour. Similarly structs.
--
"The way I see it, an intelligent person who disagrees with me is
probably the most important person I'll interact with on any given
day."
--Billy Chambless
On 10 Mar 2007 08:10:53 -0800, in comp.lang.c , "Harald van D?k"
<tr*****@gmail. comwrote:
>You snipped too much. You claimed that an array isn't a type, and that
that is the reason it has to be different.
You apparently mentally snipped too much, for the distinction I was
drawing was between a simple and derived type.
>And I showed that you /can/ assign to a struct using that same method.
So what? As I've said ad nauseam, you can't prove it by example, only
disprove by counterexample.
--
Mark McIntyre
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan
On Sat, 10 Mar 2007 09:25:20 -0800, in comp.lang.c , Ben Pfaff
<bl*@cs.stanfor d.eduwrote:
>That part of your original statement, in the second sentence, was
correct (except for the grammatical error of "its"). The problem
was with the first sentence. Here, let me present it again:
Feel free, I've done so myself elsethread.
>Mark McIntyre <ma**********@s pamcop.netwrite s:
>An array isn't a type. Its a derived type, and has different
behaviour. Similarly structs.
Clearly people are harder of reading than I thought. The distinction
I'm making is between a simple and derived type.
--
Mark McIntyre
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan
Default User said:
Richard Heathfield wrote:
>Default User said:
Richard Heathfield wrote:
Default User said:
<http://groups.google.c om/support/bin/topic.py?topic= 9246>
What would Google know about newsgroups?
He's a Google user, he ought to be at least familiar with their
help section.
Yeah. What he might not realise from reading Google's help pages is
that newsgroups are not a Google product, but a well-established
on-line society to which Google has attached itself like a remora.
Did you actually READ the link I provided?
Yes, actually. Hence "might not" rather than "will not".
<snip>
--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999 http://www.cpax.org.uk
email: rjh at the above domain, - www.
Mark McIntyre said:
On Sat, 10 Mar 2007 09:25:20 -0800, in comp.lang.c , Ben Pfaff
<bl*@cs.stanfor d.eduwrote:
>>That part of your original statement, in the second sentence, was
correct (except for the grammatical error of "its"). The problem
was with the first sentence. Here, let me present it again:
Feel free, I've done so myself elsethread.
>>Mark McIntyre <ma**********@s pamcop.netwrite s:
>>An array isn't a type. Its a derived type, and has different
behaviour. Similarly structs.
Clearly people are harder of reading than I thought. The distinction
I'm making is between a simple and derived type.
Nevertheless, the way in which you drew that distinction is flawed, and
that's all that your correspondents seem to be claiming.
If an array is a derived type, then it is a type, and yet you claimed:
"An array isn't a type." Clearly, you understand that it /is/ in fact a
type, so presumably you will understand and agree that the sentence I
just quoted is incorrect.
--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999 http://www.cpax.org.uk
email: rjh at the above domain, - www.
Mark McIntyre <ma**********@s pamcop.netwrite s:
>>Mark McIntyre <ma**********@s pamcop.netwrite s:
>>An array isn't a type. Its a derived type, and has different
behaviour. Similarly structs.
Clearly people are harder of reading than I thought. The distinction
I'm making is between a simple and derived type.
OK. In the future please try to make it clear by saying "An
array isn't a simple type" then.
--
"...Almost makes you wonder why Heisenberg didn't include postinc/dec operators
in the uncertainty principle. Which of course makes the above equivalent to
Schrodinger's pointer..."
--Anthony McDonald
Mark McIntyre wrote:
On 10 Mar 2007 08:10:53 -0800, in comp.lang.c , "Harald van D?k"
<tr*****@gmail. comwrote:
>You snipped too much. You claimed that an array isn't a type, and that
that is the reason it has to be different.
You apparently mentally snipped too much, for the distinction I was
drawing was between a simple and derived type.
>And I showed that you /can/ assign to a struct using that same method.
So what? As I've said ad nauseam, you can't prove it by example, only
disprove by counterexample.
You mean you can't prove that assignment is possible by providing
an example of assignment; but it's possible to disprove it by providing
piece of code which isn't even C? Interesting. What does "one can
assign structures" in your world? You really need to state what you
are "proving".
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