C++ question

[pirata nervo]

I am still learning C++.

(this is my first C++ project. The only things I have coded in C++ were a few samples)
I find it hard to get used to C++ when I am used to code in C.

So I created an object handler for a game me and jo3_sum are creating and here it is the part I need help with:

typedef struct Model_obj
{
    //OBJ_Model obj_model;
    BMOBJ obj_class;
} Model_obj;

typedef struct Model_md2
{
    BMMD2 md2_class;
    MD2_Model md2_model;
} Model_md2;

typedef struct Model
{
    int mod_type; // one of the definitions
    Model_obj obj;
    Model_md2 md2;
    //float x, y, z;
} Model;

The md2 loader works, I am nearly done with the obj loader but soon we should have both working.

The thing is whenever I do:

Model something;

It automatically stores:

    BMOBJ obj_class;

    BMMD2 md2_class;
    MD2_Model md2_model;

in memory, but we should only need one kind of model per structure("something" structure?) (I don't even know if that's the correct word in English). Thus, what I wanted to do is to use ONLY one of the model structures, either:

    Model_obj obj;

or:

    Model_md2 md2;

Depending on the model format.

One thing that would (probably) work is to use a pointer instead, and allocate one of the pointers and (maybe) delete the other pointer?

Thanks for the help

Edit:
Figured out to do it in a different way