Header File Error

[Phoenix861]

I'm getting this error:

error: `root' undeclared (first use this function)

in multiple places in my header file. I have 'root' defined in another header file as:

protected:
nodeType<elemType> *root;

so I am unsure why I'm getting the error.
Can anyone help?

[Disch]

Are you sure you're in the right scope?

It looks like root is part of some class. Maybe you forgot to put those member functions in the class.

For example:

// myclass.h
class MyClass
{
public
  int AFunction();

protected:
  int root;
};

//==========
//  myclass.cpp

#include "myclass.h"

int AFunction()  // notice, forgot the scope operator, therefore this function is global
{
  return root;  // ERROR, 'root' doesn't exist in the global namespace
}

int MyClass::AFunction() // here we have the scope operator -- so we're in MyClass
{
  return root;  // OK, 'root' exists in MyClass so no error here.
}

[Phoenix861]

It is under a template class

template <class elemType>
class binaryTreeType
{
.
.
.
protected:
nodeType<elemType> *root;
}

and it's being called in another header file which includes the class

template<class elemType>
void guessingTreeType<elemType>::CreateTree(nodeType<elemType> &rootNode)
{
root = &rootNode; <- here is where i get the error
}

[Disch]

root looks like it's a part of the binaryTreeType class... but your function is part of the guessingTreeType class.

Does guessingTreeType have a 'root' variable?

[moorecm]

I think I've read about this before (assuming that guessingTreeType is a binaryTreeType). I think you have to explicitly tell it where to find root but I forget the details of why. Try this->root.