using static variables

[Guest_imported]

I'm trying to declare a static variable in a class, which any subclass can access. For example,

class superclass
{
public:
static int i;

};

class subclass1: public superclass
{
void main()
{
i++;
}
}

Now if in my main program, I do something like:

subclass1* S;
S = new subclass1;
S -> main();

I get an unresolved external symbol error:

"error LNK2001: unresolved external symbol "public: static int statictester::i""

What does this error mean, and any suggestions on how I can fix this?

Bob

 

[Jeffray]

In addition to what you've done, you should also declare the static variable from outside of the class:

int superclass::i =0;

 

[Guest_imported]

I'd much rather initialize it from within the class constructor. Is there any way I can do this?

Bob

 

[Jeffray]

No. You cann't do that.
static data member must be initialized at file scope instead of the class scope.