first consider a case..
if u write
book b1=b2 ;
for the above statement copy constructor is invoked..
just take the (b) option
Book ( Book k)
{
}
which mean in main function u might be using something like
book ob1;
book ob2( ob1); // that means u passing ob1 to copy constructor and it wud
be treated as
// book k = ob1 ;
so for this book k = ob1 ,, again the copy constructor is invoked ...
this process is recursive and does not come to an end..
so thats why (b) option is incorrect.
so u r allowed to have only reference in the constructor argument list..
am i clear?
On Tue, Aug 30, 2011 at 10:02 PM, tech coder <[email protected]>wrote:
> ++rahul
>
> see a constructor cant recieve an srgument of the same class type(by
> value), although it can recieve a reference of same class type, because the
> process become recursiv eand go infinite till stack overflow
>
>
> On Tue, Aug 30, 2011 at 9:28 AM, rahul sharma <[email protected]>wrote:
>
>> a. default constructor
>> c. copy
>> d. parametrized.....
>>
>> in b it should recieve reference
>>
>>
>>
>> On Aug 30, 9:24 pm, Anuj kumar <[email protected]> wrote:
>> > Q)Given a class named Book, which of the following is not a valid
>> > constructor?
>> > (A) Book ( ) { }
>> > (B) Book ( Book b) { }
>> > (C) Book ( Book &b) { }
>> > (D) Book (char* author, char* title) { }
>> > Ans:B
>> >
>> > how plz give reason..
>>
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