| reads from a stream a single character and returns its character code.
get_code(-Char)
get_code(+Stream, -Code)
get_code/1 reads a single character from the current
input stream.
get_code/2 reads a single character from the stream named
in the first argument.
get_code reads the character at the current stream position
and unifies its character code with Code.
If the stream position is behind the end of stream,
Code will be unified with -1.
Arguments
Stream text input stream
Code integer (unicode or -1)
Examples
Assume the content of a stream S is abcdefg and the
stream position is at the 1st character.
| get_char(S, 0'a). |
Succeeds. The stream position will be advanced by one character. |
| get_char(0'd). |
Fails. The stream position will be advanced by one character. |
Standard
These predicates are part of the ISO-Prolog Standard.
See also
get_char/1/2,
peek_char/1/2,
peek_code/1/2,
put_char/1/2,
put_code/1/2,
nl/0/1,
set_input/1,
current_input/1.
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