How to use in ObjectiveC project C++ files
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I have a reqular objective C project. I import 10 C++ files into my project. All this files take "are communicating" with each other. If I have a look at File1.h, this file can manage all the operations in other class. 

So, the question is How to include reference to File1.h and to call functions from it.
For example: `[File1Class getAudioData];`
If I include it by `#include "File1.h"`, I will get a error "Class is unknown element"

P.S. I want to import [aurioTouch2][1] sample code to my project and to call functions from theire C++ code.  

  [1]: http://developer.apple.com/library/ios/#samplecode/aurioTouch2/Introduction/Intro.html