typedef struct
{
    signed short d01 : 2;   //遵循1
  unsigned short d02 : 2;   //遵循2
  unsigned short res : 12;  //遵循3
} sData;

int main ( void )
{
  sData my_data;

  my_data.d01 = 1;
  my_data.d02 = 1;
  my_data.res = 0;

  return ( 0 );
}