typedef enum {NOT_ARRIVED, READY, RUNNING} StateType;

void printState(StateType state) {
  printf("State is ... ");
  switch (state) {
  case NOT_ARRIVED: printf("not arrived\n"); break;
  case READY:       printf("ready\n"); break;
  case RUNNING:     printf("running\n"); break;
  }
}

int main() {
  StateType state;
  state = READY;
  printState(state);
  
  printf("\n");
  printState(RUNNING);
}