May I use a global data in a class?

[shuisheng]

Dear All,

Would you please help me to look at this case?

// "CA.h"
class CA
{
};

// "CA.cpp"
CA a;

// "CB.h"
extern CA a;
class CB
{
public:
// fun() use global data a.
void fun()
{
....
a.fun();
....
}
};

I think this is ok, but the compiler gives me lots of error.

Anybody can help me to correct it?
Thanks,

Shuisheng

 

[Davlet Panech]

Dear All,

Would you please help me to look at this case?

// "CA.h"
class CA
{
};

// "CA.cpp"
CA a;

// "CB.h"

#include "CA.h"

extern CA a;
class CB
{
public:
// fun() use global data a.
void fun()
{
....
a.fun();

There's no member "fun" in class "CA".

....
}
};

I think this is ok, but the compiler gives me lots of error.

What errors are you getting?

 

[shuisheng]

Davlet Panech 写é“：

#include "CA.h"


There's no member "fun" in class "CA".


What errors are you getting?

I found the reason. I cross-referenced the two head files. Thanks for
your reply.