error c2036 : unknown size if structure

Question

I have 2 class(A & C) defined in a file allocate.h and class B defined in work.h .
I included allocate.h inside work.h file
My code looks like :

Class A{  
}  

Class C
{  
public:  
    struct xyz{  
        A ob;  
    };  
}  

include"allocate.h"   
Class C;   
Class B{  
  void test(){  
      xyz obj; // `Error : error c2036 : xyz unknown size`  
  }  
}  

Can someone tell me how can i communicate the size of xyz structure in function test?

Answer 1

class in C++ (which is case-sensitive) is all lower-case and the declarations end in semicolons. Please paste real code into your questions!

In this instance, xyz is declared within the scope of class C , so you'll need to specify the scope when you use it.

class B{
    void test(){
        C::xyz obj;
    }
};