public function calls

[BlueDoze]

I want to know the difference between the following 3 methods of
calling a public function, which method is better and why

method 1:

myClass::myFunc tion();


method 2:
myClass myObject;
myObject.myFunc tion();

method 3:
myClass * pMyObject;
pMyObject->myFunction() ;

I know the difference between 2 and 3, but i'd like to know the
differences between 1 and the others

BlueDoze

[Julián Albo]

Re: public function calls

BlueDoze escribió:
[color=blue]
> method 1:
>
> myClass::myFunc tion();[/color]

You call this way when myFunction is a static member function of
myClass.

Regards.

[.oO LGV Oo.]

Re: public function calls

> method 3:[color=blue]
> myClass * pMyObject;
> pMyObject->myFunction() ;[/color]

and method 3 is generally used for polymorphism ; if pMyObject points to a
derived class of myClass and if myClass declares virtual functions, then you
get polymorphism

[jeffc]

Re: public function calls


"BlueDoze" <bluedoze@yahoo .com> wrote in message
news:a53ecee3.0 311020306.2054e e9f@posting.goo gle.com...[color=blue]
> I want to know the difference between the following 3 methods of
> calling a public function, which method is better and why
>
> method 1:
>
> myClass::myFunc tion();
>
>
> method 2:
> myClass myObject;
> myObject.myFunc tion();
>
> method 3:
> myClass * pMyObject;
> pMyObject->myFunction() ;
>
> I know the difference between 2 and 3, but i'd like to know the
> differences between 1 and the others[/color]

Method 1 would be used in 3 cases:
a) myFunction is a static function, being called from somewhere outside
myClass
b) it's a function of the base class, where it's being called from a derived
class of myClass
c) it's a member function being called from another function of myClass.

In the case of c) it's not necessary to prefix with myClass - in fact it
would be redundant and confusing.