@c Generator: GNU source-highlight, by Lorenzo Bettini, http://www.gnu.org/software/src-highlite
@example
@r{@i{// test special #if 0 treatment}}

@b{int} main() @{
@r{@i{#if 0 // equivalent to a comment}}
  @b{int} i = 10;
  printf(@t{"this should never be executed}\n@t{"});
  @b{return} 1;
@b{#else}
  printf(@t{"Hello world!}\n@t{"});
  @b{return} 0;
@b{#endif}

  printf(@t{"never reach here!}\n@t{"});
@}

@end example