Error C2079 Object::color uses undefined struct 'Vector'

[2NywAqkS]

I have a header file for a vector that looks like this:

#ifndef VECTOR_H
#define VECTOR_H

#include "main.h"

struct Vector
{
	double x;
	double y;
	double z;

	// Funtions
	double Dot(Vector);
	Vector Cross(Vector);
	double Magnitude();
	Vector Normal();
	Vector operator + (Vector);
	Vector operator - (Vector);
	Vector operator * (Vector);
	Vector operator * (double);
	bool operator == (Vector);

	Vector();
	Vector(double x, double y, double z);
};

#endif 

However in another header I want some vector members like this

//// object.h
struct Vector; // If I don't define Vector here a get a bunch more errors

struct Object
{
	Vector color;

	virtual Intersection Intersect(Ray l);
	virtual bool operator == (Object);
	Object();
};

This gives my the error in the title. How do I get around this problem without having to use pointers? and preferably without having to redefine vector in every header?

Thanks,
Rowan.

[vlad from moscow]

You should include the header file with the definition of Vector in object.h

[2NywAqkS]

Doesn't help :(

in main.h both vector.h and object and included

#include "vector.h"
#include "objects.h" 

[vlad from moscow]

Show how you include all your haders in your modules.

[Lowest0ne]

Dont include main.h in vector:

vector.h - no includes
vector.cpp - include vector.h

object.h - include vector.h
object.cpp - include object.h

main.h - include object.h (optionally vector.h)
main.cpp - include main.h