get0/1 — read the next character
get/1 — read the next printable character
Char with the ASCII code of the next character from the current input stream. If there are no more characters left in the stream,
Char will be unified with -1
get/1 discards all non-printing characters from the current input stream. It unifies
Char with the ASCII code of the first non-blank printable character. Char is unified with -1 on end of file.
?- get(First),get(Second),get(Third). ABCDEFGHI<newline> First=65, Second=66, Third=67 yes.