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

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

  dis = 3;
  hei = Vel ( &dis ) + Acc ( &dis );        //违背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;
}