Weird class problem!

I am having a class named EFX_Camera defined like this:

Code:

struct EFX_CameraSystem
{
    EFX_VECTOR3 position;
    EFX_VECTOR3 lookat;
};

class EFX_Camera
{
    public:
    void SetPosition(EFX_VECTOR3 Pos);
    void SetLookAt(EFX_VECTOR3 LookAt);

    private:
    EFX_CameraSystem   system;
};

The EFX_VECTOR3 is a class with a constructor EFX_VECTOR3(float x, float y, float z) that passes the parameters values in the class member variables f_x, f_y, f_z.

But I get the error EFX_Camera no approproate default constructor available. (VC++6)

I do not need a constructor for this, but even if I add one, I get this error: EFX_CameraSystem no appropriate constructor available.

Please help, I do not know how to fix this. It is weird.

If you add a construtor that takes params, and you wish to use a default constructor, then you must explicitly include one.....the compiler will not do it for you in these circumstances.

Code:

struct EFX_VECTOR3{
	EFX_VECTOR3(float x,float y,float z){fx=x;fy=y;fz=z;}
	EFX_VECTOR3(){fx=fy=fz=0;}
	float fx,fy,fz;
};

>>I do not need a constructor for this

Ah...but you do!

Code:

struct EFX_CameraSystem
{
    EFX_VECTOR3 position;
    EFX_VECTOR3 lookat;
};

Each of these members are relying on a default constructor

Oh thank you. I haven't thought of it.
Well, here is one more thing to my list of C++ knowledge