C++ class question

Toe Twister

Hey, I'm somewhat new to C++ and just wondering if there's a way to do the following. I've got two classes and want to be able to pass each one as an argument to another, eg:

matrix3.multiply(vector3);

vector3.multiply(matrix3);

I've hit an obvious problem in declaring these classes - each one is expecting the other to be defined. Is there any way around this?

Any advice appreciated!

dazberry

I'm not a c++ developer but lookup the concept of forward class declarations, something like this:

class matrix3;

class vector3
{
  public void multiply (matrix3 m3)
  {
  // stuff
  }
};

class matrix3
{
  public void multiply (vector3 v3)
  {
  // stuff
  }
};

HTH

D.

Toe Twister

Thanks, dazberry - that's done the trick!

Code looks something like:

vector3.h:

class matrix3;  // Forward declaration.

class vector3
{
  // stuff
  vector3 multiply(const matrix3&);
};

vector3.cpp:

#include "vector3.h"
#include "matrix3.h"

vector3 vector3::multiply(const matrix3& m) 
{
  // stuff
}