How do you have 2 classes point to each other? I have tried
[B]ClassA.h[/B]
[cpp]#pragma once
#include "ClassB.h"
class ClassA
{
ClassB* B;
};[/cpp]
[B]ClassB.h[/B]
[cpp]#pragma once
#include "ClassA.h"
class ClassB
{
[U] ClassA* A;[/U]
};[/cpp]
But I am getting the error.
[quote]Error 1 error C2146: syntax error : missing ';' before identifier 'A' 7[/quote]
Because ClassB isn't seeing ClassA.
Is this even possible in C++?
I would combine them but 1 class is managed and the other is unmanaged and when combining them the unmanaged portion breaks.
So I want ClassA (managed) to call a function in ClassB (unmanaged) and then ClassB will call a function in ClassA that will trigger an event.
forward declare one of the classes.
[editline]07:12PM[/editline]
[B]ClassB.h[/B]
[cpp]#pragma once
#include "ClassA.h"
class ClassA;
class ClassB
{
ClassA* B;
};[/cpp]
Isn't this a no-no?
Error 1 error C2079: 'ClassB::A' uses undefined class 'ClassA' 8
[b]ClassA.hpp[/b]
[cpp]
#ifndef CLASS_A_HPP
#define CLASS_A_HPP
class ClassB;
class ClassA
{
public:
ClassB* B;
};
#endif
[/cpp]
[b]ClassB.hpp[/b]
[cpp]
#ifndef CLASS_B_HPP
#define CLASS_B_HPP
#include "ClassA.hpp"
class ClassB
{
public:
ClassA* A;
};
#endif
[/cpp]
[b]main.cpp[/b]
[cpp]
#include "ClassA.hpp"
#include "ClassB.hpp"
int main (int argc, char *argv[])
{
ClassA* a = new ClassA;
ClassB* b = new ClassB;
a->B = b;
b->A = a;
delete a;
delete b;
return 0;
}
[/cpp]
Is how it's done.
-snip-
Sorry, you need to Log In to post a reply to this thread.
