// -----------------------------------------------------------------
// This part represents the header file, "matrix.hpp", which declares
// the type and parameters to the matrix routines, but does not 
// provide the actual code.  This part is said to provide the fuction
// "prototypes" or the "class interface".
// -----------------------------------------------------------------
#include <cmath>         // Some system files may be included here too.

// This protects against multiple definitions of the classes defines.
#ifndef MY_MATRIX_HPP
#define MY_MATRIX_HPP
  // Class definitions go here.  These show what parameters are involved
  // in creating, destroying, copying, etc., an instance of the class
#endif