Permutations of a given string

Fri, 04 Jul 2008 12:37:12 -0700, Keith Thompson wrote:
Which actually raises a nearly interesting issue. C99 7.19.2p2 says:
>
A text stream is an ordered sequence of characters composed into
_lines_, each line consisting of zero or more characters plus a
terminating new-line character. Whether the last line requires a
terminating new-line character is implementation-defined.
>
It's not clear from this wording whether an empty stream, consisting of
zero lines, is valid. I have no doubt that it was intended to be the
case; this is merely an issue about the wording in the standard.

Your inference that an empty stream contains zero lines is only valid on
implementations that define a line as requiring a newline character.
Under implementations which define the final newline as optional or
forbidden, the empty (zero-character) stream may contain 1 line.

In any case if you are going to be picky over an entirely academic point,
the standard you quote above says "lines" not "line or lines", so one
could argue that a one-line stream was invalid. Even discussing it would
be a bit sad though

viza