int fun ( int p );

int main ( void )
{
  int x = 1, y = 2, z = 3;
  int r;

  y = y + ( x++ );  //违背1
  z = z + ( ++y );  //违背2
  z = fun ( --z );  //违背3
  r = fun ( z-- );  //违背4

  return ( 0 );
}

int fun ( int p )
{
  int ret;

  ret = 2 * p;
  
  return ret;
}