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Groups > comp.lang.c++ > #5533
| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: Lets put it another way |
| Date | 2011-05-26 09:19 +1200 |
| Message-ID | <945a35Fn9oU1@mid.individual.net> (permalink) |
| References | (4 earlier) <aYNCp.9364$2E6.4304@newsfe18.ams2> <942fm0Fuc5U1@mid.individual.net> <miUCp.16847$h35.2542@newsfe19.ams2> <942v9uFv4kU3@mid.individual.net> <yD4Dp.17105$h35.2097@newsfe19.ams2> |
On 05/25/11 10:13 PM, Paul wrote:
>
> "Ian Collins"<ian-news@hotmail.com> wrote in message
> news:942v9uFv4kU3@mid.individual.net...
>> On 05/25/11 08:11 AM, Paul wrote:
>>> "Ian Collins"<ian-news@hotmail.com> wrote:
>>>> On 05/25/11 12:58 AM, Paul wrote:
>>>>>>
>>>>> You are not addressing the what stores the memory address.
>>>>
>>>> Because there isn't an address to store. The typeid operator (like
>>>> sizeof) works with types, not values. In a simple case such as this the
>>>> operand is not evaluated. Until you understand this you will be stuck
>>>> in
>>>> limbo.
>>>>
>>>> I could have simplified my simplification further by writing
>>>>
>>>> std::cout<< typeid(int[3]).name()<< std::endl;
>>>>
>>>> See? No memory address just a type.
>>>>
>>>
>>> There is an address stored.
>>>
>>> Look at the code :
>>>
>>> int main(){
>>> int (*pp)[3] = (int (*)[3])new int[3];
>>> std::cout<<*pp;
>>> }
>>> If this does not output an address what the hell is it?
>>
>> The value returned by new.
>
> Which is an address value.
Correct, an int*.
>>>>> A memory address value is stored so there must be an object to store
>>>>> this
>>>>> value, you say there is no object so what is it that stores this value?
>>>>
>>>> There isn't an address. Where's the address in typeid(int).name()? Or
>>>> sizeof(int)?
>>>>
>>> The address is shown in my code above.
>>
>> The address in your code id the value return by new. No amount of casting
>> will change that.
>
> The value returned from new is a pointer value that is an address.
>
> Why do you think it is not an address?
I don't. You changed the context. You originally posted
std::cout<< typeid(*p2).name();
and asked "what is the object that stores the address and is interpreted
as an array type by the typeid expression?" and I explained that no
object is required for typeid because the type is known at compile time.
Did you understand that?
--
Ian Collins
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Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 02:14 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-24 13:33 +1200
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-23 18:39 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 10:42 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 03:00 -0700
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 03:03 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 14:54 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 13:46 -0700
Re: Lets put it another way Leigh Johnston <leigh@i42.co.uk> - 2011-05-24 21:49 +0100
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 23:56 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 16:51 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 10:59 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 03:51 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 12:49 +0100
Re: Lets put it another way "Joel C. Salomon" <joelcsalomon@gmail.com> - 2011-05-25 12:32 -0700
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:42 -0700
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:48 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 21:55 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:59 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:08 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 14:29 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:56 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 15:10 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:53 +0100
Re: Lets put it another way "Joel C. Salomon" <joelcsalomon@gmail.com> - 2011-05-25 15:02 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:37 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:03 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:19 +0100
Re: Lets put it another way Leigh Johnston <leigh@i42.co.uk> - 2011-05-26 00:29 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:30 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:58 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 17:10 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 01:26 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 17:54 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 10:42 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-26 03:06 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 11:25 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-26 03:33 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 12:56 +0100
Re: Lets put it another way Vidar Hasfjord <vattilah-groups@yahoo.co.uk> - 2011-05-25 16:09 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:20 +0100
Re: Lets put it another way "Joel C. Salomon" <joelcsalomon@gmail.com> - 2011-05-25 13:56 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:18 +0100
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 12:45 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:47 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:03 +0100
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 14:32 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 14:16 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 00:00 +0100
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 10:20 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-24 22:27 +1200
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 13:58 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-25 07:36 +1200
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 21:11 +0100
Re: Lets put it another way Oliver Jackson <chexmofo@hotmail.com> - 2011-05-24 16:04 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 11:27 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-25 12:03 +1200
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 11:13 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 09:19 +1200
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:39 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 14:45 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:01 +0100
Re: Lets put it another way Leigh Johnston <leigh@i42.co.uk> - 2011-05-25 22:48 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 09:57 +1200
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:09 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 10:17 +1200
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:56 +0100
Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 13:04 +1200
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 10:47 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 15:17 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:03 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:14 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:32 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:39 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 01:18 +0100
Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 17:52 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 10:53 +0100
Re: Lets put it another way Vidar Hasfjord <vattilah-groups@yahoo.co.uk> - 2011-05-25 15:31 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:58 +0100
Re: Lets put it another way Vidar Hasfjord <vattilah-groups@yahoo.co.uk> - 2011-05-25 16:54 -0700
Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 01:00 +0100
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