Strange class definition

[seema]

I am new to C++ programming, can somebody explain what is this
me_xx is it a type name or instantiation of class Final. And also
how to use me_xx ?
struct IViewObjectEx
{

public:
void solv()
{
}

};

class XViewObject : public IViewObjectEx {

public:
virtual void Draw()=0;

};

class Final: public XViewObject
{
public :
void Draw(){
cout <<"Drawing thru Draw()"<<endl;
}

} me_xx;

int main(){
Final pre;
}

Thanks in advance,
Seema

[Victor Bazarov]

Re: Strange class definition

seema wrote:[color=blue]
> I am new to C++ programming, can somebody explain what is this
> me_xx is it a type name or instantiation of class Final. And also
> how to use me_xx ?[/color]

It's an instance. It's like this: C++ allows to define a class with or
without declaring something in the same statement. In actuality those
are two separate grammar constructs, IIRC, but they look very similar.

IOW, you can write

struct A {}; // class definition

or

struct A {} a; // class definition _and_ an object declaration

Use 'me_xx' just like you would any other object of type 'Final'.
[color=blue]
> struct IViewObjectEx
> {
>
> public:
> void solv()
> {
> }
>
> };
>
> class XViewObject : public IViewObjectEx {
>
> public:
> virtual void Draw()=0;
>
> };
>
> class Final: public XViewObject
> {
> public :
> void Draw(){
> cout <<"Drawing thru Draw()"<<endl;
> }
>
> } me_xx;
>
> int main(){
> Final pre;
> }
>
> Thanks in advance,
> Seema
>[/color]

V
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