Problem to define structure in header

Hello everybody,

I have a monolithic and big  toto.cpp code to split into a clean

toto.hpp, toto_mod.cpp, main_toto.cpp.

When I tried to compile , after spliting, I had the following error :

------------------------------------------------------------------------------------------------------------------------------------------------

1>------ Build started: Project: Archi-II-RLD-1D-V.4, Configuration: Debug Win32 ------

1>  Archi-II-RLD-1D-V.4.cpp

1>  Archi-Main.cpp

1>  xilink: executing 'link'

1>Archi-Main.obj : error LNK2005: "struct Seg Seg" (?Seg@@3U0@A) already defined in Archi-II-RLD-1D-V.4.obj

1>Archi-Main.obj : error LNK2005: "struct SysRac * sR" (?sR@@3PAUSysRac@@A) already defined in Archi-II-RLD-1D-V.4.obj

1>D:\PROJET--COUPLAGE-VISUAL-SOURCES--\ARCHI-1D-RLD-AVRIL-2014_\ARCHI-II-RLD-1D-V.4\ARCHI-II-RLD-1D-V.4\Archi-II-RLD-1D-V.4\Debug\Archi-II-RLD-1D-V.4.exe : fatal error LNK1169: one or more multiply defined symbols found

========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

----------------------------------------------------------------------------------------------------------------------------------------------------------

But the matter is that struct Seg, and SysRac * SR are just defined inside toto.hpp as following :

typedef struct SysRac *pTSysRac;

typedef struct Axe *pTAxe;   /* Pour chacun des axes */

typedef struct Pointe *pTPointe; /* Pour les pointes, parties apicales des racines */

typedef struct Seg *pTSeg; /* Pour les segments, qui sont des portions d'axes */

struct SysRac /* Ensemble d'axes */

  {

  .........

} ;

struct Axe /* Ensemble constitué d'un méristème et liste de noeuds */

  {

 ................................................

  } ;

struct Pointe /* Méristème apical, ou pointe de chaque racine */

  {

  ....................

};

struct Seg

  {

  .......

  } Seg;

Any one could Help ?

Thanks in advance.

With Best Regards.