int main ( void )
{
  int i = 0;
  int j;

  //......

  if ( 0 == i )
  {
    j = 1;            //遵循1
  }
  else if ( 1 == i )
  {
    j = 3;            //遵循2
  }
  else
  {
    j = 5;            //遵循3
  }

  return ( 0 );
}