My struct object in another class doesn't exist?!

[AlanCOBOL]

PROBLEM HAS BEEN SOLVED

I'm having some major issues with using structs in other classes. I'm using an IDE that uses header and source files for different classes, but I don't think that's the problem even though declaring certain things is different.

I have two classes, one is main and another is creature.

In the Creature class, I have a struct called "gameObject" and an object of said struct called obj_player.
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- Creature.h -

class Creature
{
    public:
        Creature();
        void update();
        void playerInput();

        struct gameObject; // <--

        enum dir{LEFT,RIGHT};
    private:

};

- Creature.cpp - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

struct Creature::gameObject // <--
{
    int x, y, // position
    height, width, // virtual width and height (mostly used as reference for box collider)
    box1, boy1, box2, boy2; // virtual Box Collider

    dir facing; // direction the game object is facing
};

Creature::gameObject obj_player = {0,0,32,32,0,0,0,0}; // create a Player game object <--


Creature::Creature()
{
    obj_player.facing = RIGHT;
}

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In my main class, I create an object of Creature class called creature. and then try to change obj_player's x value to 42
----------------------------------------------------------------------------------------------------------------------------------------------------------------
- main.cpp -

int main()
{
Creature creature; // <--
creature.obj_player.x = 42; // <--
}

----------------------------------------------------------------------------------------------------------------------------------------------------------------
When I do this, I receive an error!
"error: 'class Creature' has no member named 'obj_player'"
----------------------------------------------------------------------------------------------------------------------------------------------------------------
I could have this whole thing wrong. Say you were to have a different class and want to use structs to create virtual game objects, then use them in main. How would you do it?

Heck if you could, I'm going to have a game with multiple enemies inside Creature as well, what would be a better way to hold all of their data including the players? I'm still pretty new to making games in C++ and the only teacher is me. I often find myself a little confused in just finding a method in which to do things and get road blocked when I run into errors like these. I just can't seem to find the right way to do anything.

[D80DSL3A]

What you have in Creature.h is more like a forward declaration of the gameObject structure defined in the Creature.cpp file.
There is no member called obj_player declared in Creature.h

I would do this:

class Creature
{
    public:
        Creature();
        void update();
        void playerInput();

        struct gameObject // define the structure here
        {
            int x, y, // position
            height, width, // virtual width and height (mostly used as reference for box collider)
            box1, boy1, box2, boy2; // virtual Box Collider

            dir facing; // direction the game object is facing
        };

        gameObject obj_player;// now declare an instance of gameObject as a data member of the Creature class.

        enum dir{LEFT,RIGHT};
    private:

};

Does line 10 in Creature.cpp work?
Creature::gameObject obj_player = {0,0,32,32,0,0,0,0}; // create a Player game object <--
You should probably make those assignments in the Creature constructor.

"error: 'class Creature' has no member named 'obj_player'"

This incomplete error message leaves out what line in which file was found to be faulty.
Please post error messages in their entirety.

[AlanCOBOL]

The error message you ask for was just in a line inside main (line 25, 4 in the example) in which I was asking to change the "x coordinate" inside my gameObject struct.

creature.obj_player.x = 42;

That was the only error, however...

I've done it! Apparently when declaring structs in a header file, you are actually supposed to give it a body along with all of its members rather than declaring it inside of .cpp and .h!

#ifndef CREATURE_H
#define CREATURE_H


class Creature
{
    public:
        Creature();
        void update();
        void playerInput();

        struct gameObject
        {
            int x, y, // position
            height, width, // virtual width and height (mostly used as reference for box collider)
            box1, boy1, box2, boy2; // virtual Box Collider

            //dir facing; // direction the game object is facing
        };
        gameObject obj_player;

        enum dir{LEFT,RIGHT};
    private:

};

#endif // CREATURE_H 

Now I no longer get any errors which means that it accepts my changing of obj_player inside of main! Thanks dude, you gave me some clues as to what the problem was. Man, forum sites, who knew? XDD