It should also be noted that the value of '\n' is entirely library-dependent, and '\n' can and should be converted to an environment-specific newline sequence by the library. Technically, a text stream written on system A can't be safely read on system B until a low-level line ending conversion has taken place. Thankfully, the conversion is typically 0x0D0A <-> 0x0A, but you can't take it for granted, particularly when you know the text stream was created on a non-ASCII source system.
As noted, '\n' in the C standard library translates to CR+LF in the text stream in DOS/Windows and LF in AmigaDOS.
EDIT: If you're looking to do strict ASCII conversion or scanning, then "\x0d\x0a" for "\r\n" and "\x0a" for "\n" might be "safer."
Wikipedia's Newline article covers this in pretty good detail.
