Post increment returns temp object because it has to return the old value
of object not the new incremented one:
Simply put, the code for post increment somewhat goes like this:
int operator++ (int &n){
int temp = n;
n = n+1;
return temp;
}
that's also the reason you cannot use it as a lvalue in an exprression, as
you would be assigning nowhere.
On 27 October 2012 20:09, rahul sharma <rahul23111...@gmail.com> wrote:
> But y post returns temp. object
>
>
> On Fri, Oct 26, 2012 at 8:18 PM, Saurabh Kumar <srbh.ku...@gmail.com>wrote:
>
>> i++: Post increment can't be a lvalue because Post increment internally
>> returns a temporary object (NOT the location of i) hence you cannot assign
>> anything to it. The result of i++ can be used only as a rvalue.
>> ++i: whereas, in Pre-increment value gets incremented and the same
>> location is returned back to you, hence can be used as lvalue in an
>> expression.(C++ allows this)
>> Both can be used as rvalues though.
>>
>> On 26 October 2012 18:54, rahul sharma <rahul23111...@gmail.com> wrote:
>>
>>> why pre inc. is l value and post is r value..please explain
>>>
>>> --
>>> You received this message because you are subscribed to the Google
>>> Groups "Algorithm Geeks" group.
>>> To post to this group, send email to algogeeks@googlegroups.com.
>>> To unsubscribe from this group, send email to
>>> algogeeks+unsubscr...@googlegroups.com.
>>> For more options, visit this group at
>>> http://groups.google.com/group/algogeeks?hl=en.
>>>
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Algorithm Geeks" group.
>> To post to this group, send email to algogeeks@googlegroups.com.
>> To unsubscribe from this group, send email to
>> algogeeks+unsubscr...@googlegroups.com.
>> For more options, visit this group at
>> http://groups.google.com/group/algogeeks?hl=en.
>>
>
> --
> You received this message because you are subscribed to the Google Groups
> "Algorithm Geeks" group.
> To post to this group, send email to algogeeks@googlegroups.com.
> To unsubscribe from this group, send email to
> algogeeks+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/algogeeks?hl=en.
>
--
You received this message because you are subscribed to the Google Groups
"Algorithm Geeks" group.
To post to this group, send email to algogeeks@googlegroups.com.
To unsubscribe from this group, send email to
algogeeks+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/algogeeks?hl=en.
