Pass class method to object

[FJ39j39fs]

Can I somehow pass class method to aggregated object?
I want to run one method inside Hero object too aswell.

class Menu
{
    public:
        Menu();
        virtual ~Menu();
        void displaySomeText() const;

    protected:

    private:
        Hero *hero;
};

I want to use displaySomeText() inside hero class too.

[TheToaster]

I'm not sure I'm following what you mean. If you want the Hero class to be able to call displaySomeText() then you can simply make that class take a Menu object or have displaySomeText() be a static member function if it doesn't change the state of class instances.

Also, you are not storing an "aggregated object" currently. You are storing a pointer to a Hero. This pointer needs to be initialized in the constructor or needs to be set to a Hero object at some point for it to actually reference an object. In that call, you can pass in the "this" object to a custom Hero constructor that sets its internal Menu object so it can call displaySomeText.

[FJ39j39fs]

i've got displaySomeText() const; which i want to use in two different classes, but i don't want to use inheritance, is it possible any other way or only the static member?

[TheToaster]

As I said, you can either make it a static member OR you can create a Hero constructor that takes a Menu object as a parameter and use that internal aggregated object as a method to access the displaySomeText() method.

Two options:
1.) Static method
2.) Take Menu object as a parameter in Hero constructor.

The displaySomeText() method BELONGS to Menu, so you need a Menu object to be able to access it. If you don't want to inherit, then use one of the two above options.

[keskiverto]

OP did not specificall request access in constructor. Functions take parameters too:

class Menu;

class Hero
{
public:
        void foo( const Menu& );
};

class Menu
{
public:
        void displaySomeText() const;
        void bar();
private:
        Hero hero;
};

void Hero::foo( const Menu& m ) {
    m.displaySomeText();
}

void Menu::bar() {
    hero.foo( *this );
}

[dhayden]

i've got displaySomeText() const; which i want to use in two different classes

Does displaySomeText() access member data in both class Menu and class Hero?

If it accesses neither, then it should be a global function, not a class member.

If it accesses data from one class or the other then it should be a method of that class.

If it accesses data from both classes (and you don't want to use inheritance) then make
it a global function that takes instances of both classes as parameters. For convenience, you could give each class a helper method that calls it:

void displaySomeText(Menu &, Hero &);

class Menu {
...
    void displaySomeText() { ::displaySomeText(*this, *hero); }
    Hero *hero;
};

class Hero {
...
   void displaySomeText(Menu &m) { ::displaySomeText(m, *this); }
};