regarding inheritance.

[Prince_0912]

Hello everyone, I can not inherit one class of cpp file into another class of cpp file. i get error like undefined base class etc.

[dheerendra]

Do you have separate *.h and *.cpp file ? Did you include the base class header file ? Are you including A class in B and B class in A ? Just check

[Prince_0912]

Yes i have separate .cpp and .h file and also include header file of one cpp file into another header file of cpp file. Still i get error "Base class undefined".

[SGaist]

Hi,

The please show your code. It's impossible to tell what is going wrong without any code.

[Prince_0912]

Code is.. Base class is Point3d and child class is Vector3d.

#ifndef VECTOR3D_H
#define VECTOR3D_H

#include <QVector3D>
#include <QColor>
#include <QListWidget>
#include <QList>
#include "point3d.h"

class Vector3d:public Point3d
{
public:
Vector3d();
Vector3d(float xp, float yp, float zp);
void Dispose();
Vector3d clone();
....

Error is:C2504: 'Point3d' : base class undefined

[NgtLvr]

I'm facing the same error like :
error: C2504: 'Point3d' : base class undefined

[mrjj]

@NgtLvr
hi
and if you look in
point3d.h

what is the class name there ?

[NgtLvr]

@mrjj
#include "vector3d.h"
class Point3d
{

};

[jsulm]

@NgtLvr You have cyclic dependencies between your header files: vector3d.h includes point3d.h and point3d.h includes vector3d.h. First question is: why does your Point3d need to know anything about Vector3d?

[NgtLvr]

oops!!! Sorry, You are right, there is a cyclic dependencies between two classes...

Thanks for your quick response...

[dheerendra]

Cool. A->B and B->A Cyclic case. This is what I said my first response. Enjoy. Move the issue to "Solved" state.

[Prince_0912]

Yeah that's the problem as you say cause of there are huge numbers of cpp file in hierarchy so that's the matter.

thank you,
@jsulm
@dheerendra