int main ( void )
{
  int    i = 0, j = 0, k = 0;
  double x = 0.0;

  //..

  if ( 0 == i )
  {
    x = 1.0;
  }
  else if ( 1 == i )
  {
    x = x - 1.0;
  }
  else
    ;                   //违背1

  if ( 0 == j )
  {
    x = x + 1.0;
  }
  else if
  ( 1 == j )
  {
    ;                   //违背2
  }
  else                  //违背3
  {
  }

  if ( 0 == k )
  {
    x = x / 2.0;
  }
  else if ( 1 == k )
  {
    x = x / 3.0;
  }
  else
  {
    /* no deal with */  //违背4
  }

  return ( 0 );
}