Adding more info to the class outside it?

[ihato]

Let's say I have this class:

class myClass {
    int x,y;
    public:
    int xx,yy;
    }

How to add more info from somewhere else?

I have tried this:

class myClass {
    int x,y;
    public:
    int xx,yy;
    } myInstance;

int main (){
    myInstance.xxx=9;
    }

But it says, xxx is undeclared.

How to do it?
I know it's a stupid question, but I'm stuck

[LB]

If you want to do that without using setters, then make the variables public. Though normally you use a settor or constructor.

[Peter87]

You can't add members to the class after it has been defined.

[ihato]

If you want to do that without using setters, then make the variables public. Though normally you use a settor or constructor.

And that means... what?

EDIT: ninja'd

You can't add members to the class after it has been defined.

D:
darn.

[LB]

If you want to simulate class members, use a map<string, type>

[Catfish]

myClass is the cookie cutter, and myInstance is a cookie.
Everything that myInstance needs to have, myClass must have by design.

Edit:
Also

And that means... what?

LB is referring to how you need a function for setting (a "setter") a value that is not public (in your case x and y).

Just try this to see: myInstance.x = 555;

[ihato]

Is it a good idea to create a big array in a class and store variables there?
Like this:

class myClass {
    int x,y;
    public:
    int array[32000];
    } myInstance;

int main(){
    myInstance.array[0]=0; //xx
    myInstance.array[1]=0; //yy
    }

btw thanks for explaining that getter/setter thing that LB said.

[LB]

It's not a good idea, that is a HUGE waste of memory, not to mention a fast ticket to a stack overflow.