redefinition?!

I have two template classes and a regular class.
For simplicity: TClass1, TClass2, and Class3(.h and .cpp).

TClass2 inherites TClass1. In TClass2 I have #include "TClass1.h" And then in Class3, I #include "TClass2.h". Then once in my main.cpp I #include both "Class3.h" and "TClass2.h". Then when I compile I get a redefinition error, saying the class in TClass1 has already been redefined.
Error:
h:\cs131\assignment 3\grid.h(26) : error C2953: 'grid' : template class has already been defined
(grid is the class in TClass1)

What can I do? I need to use both TClass2 and Class3 in main. And Class3 needs to use TClass2 data type (constructor and 2 public functions).

Anyone even know what I'm talking about?!

NOMAD

Wrap your classes up with conditional preprocessor blocks:

Code:

---

#ifndef TCLASS_H
#define TCLASS_H

template<class t>
class TClass
{
};

#include "TClass.cpp"

#endif

---

Z.

Z you are totally awsome! Thanks!

This question is related although a different question. Can I and should I be using the #ifndef/#define/#endif on regular header files that don't necessarily have a class in them. Example is one of my headers with just straight functions.

NOMAD

You probably should. For example, if you need <cstdio> in one of the functions in your header file and then need it again in your main .cpp file, you'll get redefinition errors.

I put preprocessor conditionals around all of my headers, for safety.

Z.

Quote:

---

Originally posted by Wynd
You probably should. For example, if you need <cstdio> in one of the functions in your header file and then need it again in your main .cpp file, you'll get redefinition errors.

---

If not for the fact that all the standard headers are guarded anyway ;)