"Base class undefined."

I've got an error:

error C2504: 'employee' : base class undefined.

I'm using Visual Studio 2010.

This is my first time working with inheritance in C++ and I can't figure out what I'm doing wrong. When I try to make a class that derives another, it says that the parent class is undefined, even though I have the header file of the parent class included. What could be the problem?

Main.cpp:

#include <string>
#include <iostream>
using namespace std;

#include "manager.h"

int main()
{
manager ian;
ian.getdata();
ian.putdata();

return 0;
}

Manager.h:

#pragma once
#include "employee2.h"
#include "student.h"

class manager : private employee2, private student //Error happens here
{
    //Stuff
};

Student.h:

#pragma once
class student
{
    //Stuff
};

Employee2.h:

#pragma once
#include "employee.h"
class employee2 : employee
{
    //Stuff
};

It says that both the student class and the employee2 class are undefined. Also, the employee2 class inherits a class called employee, which also gets the same error. What am I doing wrong?

EDIT: Here's my student.cpp file. All the other .cpp files that I'm getting errors with look similar to this one.

#include "student.h"

void student::getedu(){
cout << "Enter name of school or university: ";
cin >> school;
cout << "Enter highest degree earned n";
cout << "(Highschool, Bachelor's Master's, PhD)";
cin >> degree;
}

void student::putedu() const{
cout << "n School or university: " << school;
cout << "n Highest degree earned: " << degree;
}

---

I don't believe you are getting an "x is undefinied" based upon the code you showed. Actually, it appears you are using #include wrong.

#include employee.h

should be

#include "employee.h"

Other than that, other than the missing employee class you mention, and manager not having getdata and " putdata in your example, you code will compile fine.

---

Make sure, there are empty spaces at the end of each file. Before compilation process the files are concatinated and your pragma could be deactivated because of sth like this:

}#pragma once

the '}' comes from the previously included file.

That could be a reason. Besides, the code looks, like it should be compilable.

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