about global scope

[Cambalinho]

(correct me if i mistake)
the Global Scope is for create and initializate variables, create functions\class's\namespaces and more... i understand that.
(sorry if my question is confuse.... but i'm trying work with my english :()
when we build a class with some variables, is there any way, on Global Scope, that we can change the variables values with object name?

#define event(eventname, ... ) std::function<void(__VA_ARGS__ )> eventname

class test
{
    public:
    event(Soma,(int a,int b)) ;
    event(hello);
    void write(string a)
    {
        Console.write(a);
        Soma(2,3);
    }
};

test a;
//
int a.Soma = [](int a, int b)
{
    COORD v={10,10};
    Console.SetCaretPosition(v);
    Console.SetColorAndBackground(ForeColorRed,0,true);
    Console.write("\nMessage Printed\n" ,a+b , "\n") ;
    return 0;
}

(console is my class for work with console)
like you see i'm trying changing the Soma value on Global Scope... i'm geting errors. my question is: is there anyway for validate that for don't get errors?

erro message:

'error: expected initializer before '.' token'

without a return type:
'error: 'a' does not name a type'

please i'm trying, several time, fix these code without sucess :(

[MikeyBoy]

No, you can't do that. You can declare a global variable, but you can't run executable code at the file scope.

[Cambalinho]

if i use a static variable, i must use the class name and not the object name, right?

[MikeyBoy]

If it's a static data member, then yes. The member is, effectively, shared between all instances of the class. It's not owned by any one object.

[Cambalinho]

so can you advice me something instead 'it's no possible'?
(sorry bored you with these, but i realy need it)

[fafner]

You can have global objects like your a-object, but you still have to change the value within some function (or other scope).

[Cambalinho]

bad the C++ don't let overload the '::' operator ;)
thanks for all to all