Problem with class header please help

Hello
i have a problem.... i am trying to split a cpp file, where i have the class declaration, class implementation and main, into three separate files.
So i have created dataset.h with the following code:

Code:

---

#if !defined(DATASET_H)
#define DATASET_H

class DataSet
{
public: .....
private......
}
#endif

The file dataset.cpp with:
#include "dataset.h"

DataSet::DataSet
{
}
.... and  the other member functions declarations.

---

and the file main.cpp with

#include "dataset.h"
and the main function, where i call some public member functions of class DataSet. When i compile, it says:
Linker error: undefined symbol dataset::function1 in module main
and the same for all the functions i try to call.

What did i do wrong? The program worked perfectly before trying to split it.

Thank you very much.

Did you implement DataSet::function1 in dataset.cpp?

your project linker must link both main.obj and dataset.obj -- it is probably not linking with dataset.obj (might be .o extension if you are using Dev-C++ or gnu compiler).

For Tonto: yes, i have declared all the functions in Dataset.cpp
For Ancient Dragon: I use Borland C++ compiler v3.1. Does this help?

> I use Borland C++ compiler v3.1. Does this help?
Well it's not helping you by using some old fossil.
See other recent posts which use old compilers, and where to get something more modern.

Essentially, you need
bcc main.cpp Dataset.cpp

How you do that in your project file for your IDE is for you to figure out, but you're not compiling all your source at the moment.