try to use X b = a ; b.fun() ;
On Sun, Aug 21, 2011 at 1:33 PM, Abhishek Yadav
<algowithabhis...@gmail.com>wrote:
> ok...may be i forgot , can you please tell me correct code for the copy
> constructor..?
>
>
> On Sun, Aug 21, 2011 at 1:31 PM, JAIDEV YADAV <jaid...@gmail.com> wrote:
>
>> dude u haven't used copy constructor properly .. check it out again ...
>> you are not copying actually ... thats it ...
>>
>> On Sun, Aug 21, 2011 at 12:53 PM, Abhishek Yadav <
>> algowithabhis...@gmail.com> wrote:
>>
>>> Check this code: the thing i couldn't understand is when the object is
>>> being returned neither the copy constructor is being called nor the
>>> assignment operator overload is called....then how the object is being
>>> copied into b. i don't think default copy constructor should be called if i
>>> have made our own copy constructor....???
>>> #include<iostream>
>>> using namespace std;
>>> #include<conio.h>
>>>
>>> class X
>>> {
>>> public:
>>> int num;
>>> X(int a)
>>> {
>>> num=a;
>>> cout<<"\n constructor";
>>> }
>>>
>>> X(const X& t)
>>> {
>>> this->num=t.num;
>>> cout<<"\nCopy ";
>>> }
>>>
>>> X operator=(const X& t)
>>> {
>>> this->num =t.num;
>>> cout<<"\n Assigment ";
>>> return t;
>>> }
>>>
>>> X fun()
>>> {
>>> cout<<"\nin fun";
>>> return X(7);
>>> }
>>>
>>> ~X()
>>> {
>>> cout<<"\ndestruct ";
>>> }
>>>
>>> };
>>>
>>> int main()
>>> {
>>> {
>>> X a(1);
>>> X b=a.fun();
>>> cout<<"\n\n"<<b.num;
>>> }
>>> getch();
>>> }
>>>
>>>
>>> On Sun, Aug 21, 2011 at 12:33 PM, Abhishek Yadav <
>>> algowithabhis...@gmail.com> wrote:
>>>
>>>> The code is correct..return X will make a temporary object and for that
>>>> a constructor and corresponding destructor will be called and that object
>>>> is returned.
>>>>
>>>> On Sun, Aug 21, 2011 at 12:24 PM, Puneet Chawla <
>>>> puneetchawla...@gmail.com> wrote:
>>>>
>>>>> It will show error
>>>>>
>>>>> On Sun, Aug 21, 2011 at 12:21 PM, Sanjay Rajpal <srn...@gmail.com>wrote:
>>>>>
>>>>>> I think it will not be an error.
>>>>>>
>>>>>> This is because X() will create a temporary object, and when the
>>>>>> object is returned in the function calling it, then default copy
>>>>>> constructor will do bitwise copy of data members in the calling
>>>>>> function.
>>>>>>
>>>>>> Correct me if m wrong.
>>>>>>
>>>>>> On 8/20/11, sachin sabbarwal <algowithsac...@gmail.com> wrote:
>>>>>> > class X()
>>>>>> > {
>>>>>> >
>>>>>> > X()
>>>>>> > {
>>>>>> > }
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > X fun()
>>>>>> > {
>>>>>> > return X(); //error or what?? because constructor never returns
>>>>>> > anything so what this return statement will receive after executing
>>>>>> x() and
>>>>>> > what it will return??
>>>>>> > }
>>>>>> >
>>>>>> >
>>>>>> > };
>>>>>> >
>>>>>> > --
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>>>>>> > "Algorithm Geeks" group.
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>>>>>> >
>>>>>> >
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Sanju
>>>>>> :)
>>>>>>
>>>>>> --
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>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> With regards
>>>>> ............
>>>>> Puneet Chawla
>>>>> Computer Engineering Student
>>>>> NIT Kurukshetra
>>>>>
>>>>> --
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>>>>>
>>>>
>>>>
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>>>
>>
>>
>>
>> --
>> JaiDev Yadav
>> (National Yoga Champion)
>> Computer Engg. Dept.
>> National Institute of Technology
>> Kurukshetra,Haryana
>>
>> --
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>>
>
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--
JaiDev Yadav
(National Yoga Champion)
Computer Engg. Dept.
National Institute of Technology
Kurukshetra,Haryana
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