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February 2nd, 2009, 02:56 PM
#1
[RESOLVED] Class heirarchy help (classes using eachother)
Heya!
I have Class A that uses a variable of Class B and Class B uses a variable of Class A
I'm having issues on how to include them in such a way that I don't get errors. I tried using
Code:
#ifndef class_a
#define
...
#endif
And I did the same for Class B and tried to include them in each other's file but that didn't solve the problem.
Does anyone know a fix for this?
Thanks!
Lang
Last edited by Lang; February 2nd, 2009 at 03:32 PM.
Reason: Resolved.
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February 2nd, 2009, 03:06 PM
#2
Re: Class heirarchy help (classes using eachother)
What you are looking for is called 'forward referencing'.
Code:
// this tells the compiler that there is a class 'a', but
// we are not telling the compiler what it looks like
// the compiler will figure that out later...
class a;
class b;
{
public:
a *some_a_var;
};
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February 2nd, 2009, 03:07 PM
#3
Re: Class heirarchy help (classes using eachother)
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February 2nd, 2009, 03:08 PM
#4
Re: Class heirarchy help (classes using eachother)
easy you just need to use a forward declaration to stop the circular dependency:
http://en.wikipedia.org/wiki/Circular_dependency
ahoodin
To keep the plot moving, that's why.
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