enumeration

Projects Programming
1

struct Timer {
enum TIMERSTATE eEtat ;
unsigned long ulValue ;
unsigned long ulTempo ;
} ;

why i'd got an error that say :
error: field 'eEtat' has incomplete type

2

you must define the enum outside/before the struct like below

enum TIMERSTATE {A, B };

struct Timer {
   TIMERSTATE eEtat ;
   unsigned long ulValue ;
   unsigned long ulTempo ;
} ;

void setup(){}
void loop(){}