Very Computer

hi all,
i quote a difference between the calls of constructors <class name> and
<class name>()...

for exemple, if i use this kind of class:
class MyClass{
        int data;
    public:
        MyClass( int pData = 0){ data = pData;}

Quote:};

then, i declare:
MyClass    Obj1;
MyClass    Obj2( 5);
MyClass    Obj3();

I realized that Obj1 and Obj2 call the defined constructor, but Obj3 is an
empty instance and calls no constructor...
It appears to be strange for me, as i believed the Obj3 would call my
constructor.

Can you explain me that. Maybe there was something i didn't understand...

thanks
-nicoV-

PS: i'm using a borland 5.02 IDE

Quote:> hi all,
> i quote a difference between the calls of constructors <class name> and
> <class name>()...

> for exemple, if i use this kind of class:
> class MyClass{
>         int data;
>     public:
>         MyClass( int pData = 0){ data = pData;}
> };

> then, i declare:
> MyClass    Obj1;
> MyClass    Obj2( 5);
> MyClass    Obj3();

> I realized that Obj1 and Obj2 call the defined constructor, but Obj3 is an
> empty instance and calls no constructor...
> It appears to be strange for me, as i believed the Obj3 would call my
> constructor.

> Can you explain me that. Maybe there was something i didn't understand...

Obj3 is *not* an object, it's a function declaration.

See the FAQ, item 10.2: http://www.parashift.com/c++-faq-lite/.

Jon.

--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG

:-)
The last line says:
Obj3 is a function, taking no arguments and returning
a MyClass object.
It's not a definition of a variable, instead it is
a function prototype.

--
Karl Heinz Buchegger

ok, thanks, i see... :))