Error: does not name a type

[shark]

Hey, all passby c++ programmer, I met a problem which has baffled me for a while:
It is my first time to use Kdevelop and I am also not very conversant with C++. I created two classes: Dead and Born.

They are declared in "dead.h" and "born.h" respectively.

The content of born.h is like the following:

//////////////////////////////////////////////////// 
#ifndef BORN_H
#define BORN_H
 
#include "dead.h"
 
 
using namespace std;
 
/**
    @author shark,,, <shark@KOF>
*/
 
 
class born 
{
public:
    born();
 
    ~born();
 
public:
    dead test1;
};
 
#endif
 
////////////////////////////////////////////

OK, then comes the content of "dead.h"

///////////////////////////////////////////
#ifndef DEAD_H
#define DEAD_H
 
 
#include "born.h"
 
using namespace std;
 
/**
    @author shark,,, <shark@KOF>
*/
 
 
class dead 
{
public:
    dead_ele();
 
    ~dead_ele();
public:
 
    born test2;
};
 
#endif
 
////////////////////////////////////////////

These two classes were added by Kdevelop "New Class" item,

When I compiled the code, g++ complained:

/home/shark/TCL_project/peptide_world/src/born.h:44: error: 'dead' does not name a type

/home/shark/TCL_project/peptide_world/src/dead.h:42: error: 'born' does not name a type

But I indeed include all the necessary head file. How could that be? I tried to add the prefix of namespace reference, but it still complains...
Any ideas?

[Ganon11]

Perhaps because, in your dead class, you try to have a constructor and deconstructor named dead_ele() and ~dead_ele() instead of dead() and ~dead().

[weaknessforcats]

You are including born.h in dead.h.

That requires the compiler to know about dead before the class the declared.

[shark]

Thank you for the replies,

I am sorry that those "dead_ele()" are input typing msitakes.

Yes, I guess the use of type before declaration might be the problem, I add

"class born;"

before the declaration of dead class, and the program passed the compilation

[JosAH]

It still won't work: in your 'born' object you have a member of type 'dead' which
in turn has a member 'born' etc. etc. Better make those members pointers to
the other type to avoid an infinite growth of object sizes.

kind regards,

Jos