[Dev-C++] Templates

[Graeme F. <gr...@dr...>]

I have created a template, as follows:

template <class T,long px=0, long py=0, long pz=0>
class c3DMatrix
{
   private:        // Private member functions and variables
   protected:        // Protected member functions and variables
   public:        // Public member functions and variables
};

template <class T,long px, long py, long pz>
T c3DMatrix<T, px, py, pz>::get(long x, long y, long z)
{
   // some code to return the appropriate element
}

When I include the declaration and source code in the C++ header file
everything works correctly. However if I remove the source code out to a
separate cpp file I get a linker error as follows:

undefined reference to 'c3DMatrix<int,5,2,4>::get(long,long,long)

source code is as follows...

#include "c3DMatrix.hpp"

template <class T,long px, long py, long pz>
T c3DMatrix<T, px, py, pz>::get(long x, long y, long z)
{
   // some code to return the appropriate element
}

All three files (header, source and driver file are include in the project)

Any advice greatly appreciated.

Graeme