unsigned int Vel ( unsigned int *pcData );
unsigned int Acc ( unsigned int *pcData );

int main ( void )
{
  unsigned int dis, hei, temp1, temp2;

  dis   = 3;
  temp1 = Vel ( &dis );
  temp2 = Acc ( &dis );
  hei   = temp1 + temp2;                    //遵循1

  return (0);
}

unsigned int Vel ( unsigned int *pcData )
{
  unsigned int x = ( *pcData );

  ( *pcData ) = x * x;

  return x;
}

unsigned int Acc ( unsigned int *pcData )
{
  unsigned int x = ( *pcData );

  ( *pcData ) = 2 * x;
  
  return x;
}