Vector Iterator | | |
Hi,
If i have a std::vector containing pointers, then iterate through the
vector and im slightly confused as to how i use the item from the
iterator?
for example,
vector<MyClass*myvector;
....
vector<MyClass*>::iterator it;
for(it = myvector.begin(); it < myvector.end(); it++)
{
// This doesn't work,
**it->myclassmember();
}
What am i doing wrong? I thought the iterator is a pointer to a
pointer in this case?
Thanks alot for any help,
| | | | re: Vector Iterator
On 2008-04-22 19:25, JackC wrote: Quote:
Hi,
>
If i have a std::vector containing pointers, then iterate through the
vector and im slightly confused as to how i use the item from the
iterator?
>
for example,
>
vector<MyClass*myvector;
...
vector<MyClass*>::iterator it;
>
for(it = myvector.begin(); it < myvector.end(); it++)
{
// This doesn't work,
**it->myclassmember();
}
>
What am i doing wrong? I thought the iterator is a pointer to a
pointer in this case?
Use either
(*it)->myclassmember();
or
(**it).myclassmember();
--
Erik Wikström | | | | re: Vector Iterator
On 22 Apr, 18:50, Erik Wikström <Erik-wikst...@telia.comwrote: Quote:
On 2008-04-22 19:25, JackC wrote:
>
>
> > Quote:
If i have a std::vector containing pointers, then iterate through the
vector and im slightly confused as to how i use the item from the
iterator?
> > Quote:
vector<MyClass*myvector;
...
vector<MyClass*>::iterator it;
> Quote:
for(it = myvector.begin(); it < myvector.end(); it++)
{
// This doesn't work,
**it->myclassmember();
}
> Quote:
What am i doing wrong? I thought the iterator is a pointer to a
pointer in this case?
>
Use either
>
(*it)->myclassmember();
>
or
>
(**it).myclassmember();
>
--
Erik Wikström
Thanks very much, works fine. | | | | re: Vector Iterator
On 2008-04-22 13:50:53 -0400, Erik Wikström <Erik-wikstrom@telia.comsaid: Quote:
On 2008-04-22 19:25, JackC wrote: Quote:
>Hi,
>>
>If i have a std::vector containing pointers, then iterate through the
>vector and im slightly confused as to how i use the item from the
>iterator?
>>
>for example,
>>
>vector<MyClass*myvector;
>...
>vector<MyClass*>::iterator it;
>>
>for(it = myvector.begin(); it < myvector.end(); it++)
>{
>// This doesn't work,
>**it->myclassmember();
>}
>>
>What am i doing wrong? I thought the iterator is a pointer to a
>pointer in this case?
>
Use either
>
(*it)->myclassmember();
>
or
>
(**it).myclassmember();
Or
it->myclassmember();
--
Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
( www.petebecker.com/tr1book) | | | | re: Vector Iterator
On Apr 22, 8:36 pm, Pete Becker <p...@versatilecoding.comwrote: Quote:
On 2008-04-22 13:50:53 -0400, Erik Wikström <Erik-wikst...@telia.comsaid:
... Quote:
Or
>
it->myclassmember();
>
...
Is that possible? myvector is a vector of pointers.
Regards. | | | | re: Vector Iterator
On 2008-04-22 16:38:22 -0400, alasham.said@gmail.com said: Quote:
On Apr 22, 8:36 pm, Pete Becker <p...@versatilecoding.comwrote: Quote:
>On 2008-04-22 13:50:53 -0400, Erik Wikström <Erik-wikst...@telia.comsa
id:
... Quote:
>Or
>>
>it->myclassmember();
>>
...
>
Is that possible? myvector is a vector of pointers.
>
Try it.
--
Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
( www.petebecker.com/tr1book) | | | | re: Vector Iterator
<alasham.said@gmail.comwrote in message
On Apr 22, 8:36 pm, Pete Becker <p...@versatilecoding.comwrote: Quote: Quote:
>On 2008-04-22 13:50:53 -0400, Erik Wikström <Erik-wikst...@telia.com>
>said:
>it->myclassmember();
Quote:
Is that possible? myvector is a vector of pointers.
No. Probably Pete was in a hurry.
-- http://techytalk.googlepages.com | | | | re: Vector Iterator
Pete Becker wrote: Quote:
On 2008-04-22 16:38:22 -0400, alasham.said@gmail.com said:
> Quote:
>On Apr 22, 8:36 pm, Pete Becker <p...@versatilecoding.comwrote: Quote:
>>On 2008-04-22 13:50:53 -0400, Erik Wikström <Erik-wikst...@telia.comsa
>id:
>... Quote:
>>Or
>>>
>>it->myclassmember();
>>>
>...
>>
>Is that possible? myvector is a vector of pointers.
>>
>
Try it.
>
Ant you'll get a compile error!
--
Ian Collins. | | | | re: Vector Iterator
On 2008-04-22 17:14:59 -0400, Ian Collins <ian-news@hotmail.comsaid: Quote:
Pete Becker wrote: Quote:
>On 2008-04-22 16:38:22 -0400, alasham.said@gmail.com said:
>> Quote:
>>On Apr 22, 8:36 pm, Pete Becker <p...@versatilecoding.comwrote:
>>>On 2008-04-22 13:50:53 -0400, Erik Wikström <Erik-wikst...@telia.comsa
>>id:
>>...
>>>Or
>>>>
>>>it->myclassmember();
>>>>
>>...
>>>
>>Is that possible? myvector is a vector of pointers.
>>>
>>
>Try it.
>>
Ant you'll get a compile error!
Yup. There's an extra level of indirection that I overlooked.
--
Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
( www.petebecker.com/tr1book) |  |
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