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 <[email protected]> wrote:
> But y post returns temp. object
>
>
> On Fri, Oct 26, 2012 at 8:18 PM, Saurabh Kumar <[email protected]>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 <[email protected]> wrote:
>>
>>> why pre inc. is l value and post is r value..please explain
>>>
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