Question

I’ve got a class A defined in a separate header file. I want class B to have a reference to a object of class A stored as a variable.

Like this:

File: A.h

class A {
    //Header for class A...
};

File: B.h

#include "A.h"
class B {
    private:
(24)        A &variableName;
    public:
(36)        B(A &varName);
};

When i try to compile it with g++ I get the following error:

B.h:24: error: ‘A’ does not name a type
B.h:36: error: expected `)' before ‘&’ token

Any suggestions on what I’m doing wrong? If it matters, the class A is an abstract class.

EDIT: Some typos in the code

Answer 1

By me it compiles fine (as expected). I’m guessing A.h isn’t being included properly. Is there another file with the same name that gets included instead? Perhaps there are #ifdefs or some such that prevent the definition of A from being seen by the compiler. To check this, I would put some sort of syntax error into A.h and see if the compiler catches it.