looped include

[Dragilla]

Hi, I have a problem....
I can show you what this is about in an example:
There are 4 files:

a.c:
#include "a.h"

int main() {

B* b = new B();
A* a = new A();

a->bref = b;
b->aref = a;

b->aref->test();
a->bref->test();
return 0;
}

b.c:
#include "b.h"

a.h:
#ifndef A_H
#define A_H
#include "b.h"

#include <stdio.h>
#include <stdlib.h>

class B;
class A {
public: B* bref;
public: A() {;}
public: void test()
{
printf ("test in A\n");
bref->test();
}
};

#endif

b.h:
#ifndef B_H
#define B_H
#include "a.h"

#include <stdlib.h>
#include <stdio.h>

class A;
class B {
public: A* aref;
public: B() {;}
public: void test() { printf ("test in B\n"); }
};

#endif

Why does this not compile? I get errors in line with code: bref-

>test(); in a.h

PLEASE help.

regards,
--
LS

[Barry]

Dragilla wrote:

Hi, I have a problem....
I can show you what this is about in an example:
There are 4 files:

a.c:
#include "a.h"

int main() {

B* b = new B();
A* a = new A();

a->bref = b;
b->aref = a;

b->aref->test();
a->bref->test();
return 0;
}

b.c:
#include "b.h"

a.h:
#ifndef A_H
#define A_H
#include "b.h"

#include <stdio.h>
#include <stdlib.h>

class B;

// class B;
not needed

class A {
public: B* bref;
public: A() {;}
public: void test()
{
printf ("test in A\n");
bref->test();
}
};

#endif

b.h:
#ifndef B_H
#define B_H
#include "a.h"

//#include "a.h"
not needed

>
#include <stdlib.h>
#include <stdio.h>

class A;
class B {
public: A* aref;
public: B() {;}
public: void test() { printf ("test in B\n"); }
};

#endif

Why does this not compile? I get errors in line with code: bref-

>test(); in a.h

PLEASE help.

regards,

[Dragilla]

Ok, that worked, thanks alot.
But if I modify my files like you said and add some code, so that
class B looks like this:
class B {
public: A* aref;
public: B() {;}
public: void test()
{
printf ("test in B\n");
aref->test2;
}
};

and add function test2 to class A, i get a whole new bunch of
errors....

Actually my problem concerns Windows Forms i VC++ in .Net 2003.
I have a main form Form1 and 2 other forms i need to show/hide from
the main form.
Then i need the data from the other 2 forms back into the Form1.
I can't get it to work... Any standart solution to this?

regards,
--
LS

[Rolf Magnus]

Dragilla wrote:

Ok, that worked, thanks alot.
But if I modify my files like you said and add some code, so that
class B looks like this:
class B {
public: A* aref;
public: B() {;}
public: void test()

Repeating "public:" multiple times doesn't get it more public than it
already is ;-)

{
printf ("test in B\n");
aref->test2;
}
};

and add function test2 to class A, i get a whole new bunch of
errors....

Don't put the implementation into the header file.

[red floyd]

Rolf Magnus wrote:

Dragilla wrote:

>Ok, that worked, thanks alot.
But if I modify my files like you said and add some code, so that
class B looks like this:
class B {
public: A* aref;
public: B() {;}
public: void test()

Repeating "public:" multiple times doesn't get it more public than it
already is ;-)

Probably a java-ism (or a C#ism)

[Dragilla]

On 7 Pa , 15:37, Rolf Magnus <[e-mail]:

and add function test2 to class A, i get a whole new bunch of
errors....

Don't put the implementation into the header file.

Yes, that's what i did :) and that's the soultion :)
Thanks.