C++ class help

[lewie4]

As I mentioned below this code was wrote after being awake for almost 50 hours. Its pretty terrible and misses alot of basic stuff (such a " " around the #include "A.h" etc) but managed to wake myself up and fix it so this thread can be locked/deleted.


So I'm currently in university and I'm having a bit of trouble with my code. I've been up for almost 50 hours so I may just be missing something dumb but I can't seem to figure out how to do this. I cannot post any of my actual code due to the fact I am working with PS3 Dev kits and the source code is not allowed to be released publicly, so I will try my best to explain my problem without using any of the PS3 specific code.

Say I have 2 header file (A.h and B.h) along with 2 matching cpp files (A.cpp and B.cpp)

A.h looks similar to this

#ifndef A_H
#define A_H

#include "B.h"

class A
{
public:
void function1();
void functionA();
B m_b;
};

#endif

While B.h looks like this

#ifndef B_H
#define B_H

#include "A.h"

class B
{
public:
void function2();
void functionB();
A m_a;
};

#endif

Both these classes have other functions the the corresponding cpp files are required to used but I have left out. Within A.cpp I need to use all the functions from A.h and a single function from B.h and within B.cpp I need to use all the functions from B.h and a single function from A.h

So A.cpp currently looks similar to this:

#include A.h
#include B.h

void function1()
{
code;
}

void functionA()
{
code;
m_b.function2();
}

and B.cpp looks like

#include A.h
#include B.h

void function2()
{
code;
}

void functionB()
{
code;
m_a.function1();
}


Now obviously there is a lot more code than this but this is where I am getting the problem when compiling. I get the compiler error "Error 2 error 20: identifier "A" is undefined" and the matching "Error 2 error 20: identifier "B" is undefined".

Any help with this would be greatly appreciated. The sooner I get this done, the sooner I can sleep again

[lewie4]

Wow I'm tired and noticed how dumb I have been.

For anyone else having this problem this is how to fix it:

In B.h you need to forward declare class A and not include it as so:

#ifndef B_H
#define B_H

class A;

class B
{
public:
void function2();
void functionB();
A m_a;
};

#endif

Now include both A.h and B.h in B.cpp and it should fix the problem

A mod can lock/close this

[stoneharry]

Use code tags in the future, [-code] your code [-/code] (without the -).

function foo()
   doStuff();
end