Unknown type name 'class' error when using Obj-C class file in C++

Hello I am a basic in XCode,

I am writing to use for leader board management.I'd like to use Objective-C class file from coscos2d frame work to C++ file implementation.

I have this error message in CCObject.h so called <"Unknown type name 'class', did you mean 'Class'"?>.

The problem I am facing now is that I couldn't find which code is occurring this error.

I don't even understand what is this message meant to be?

Can anyone please help me? Appreciated your support.