Page 220 - DCAP506_ARTIFICIAL_INTELLIGENCE

Artificial Intelligence

Notes The following predicates need the input/output stream to be specified explicitly. The stream is
addressed by a name (alias name or term of open/3/4). You can also address the standard
streams by their synonyms.
Predicate Purpose
get_byte(@Stream, ?ByteCode) Read a byte
get_char(@Stream, ?Char) Read a character
get_code(@Stream, ?CharCode) Read a character
get_until(@Stream,

+SearchChar, ?Text, ?EndChar) Read up to a specific character
nl(@Stream) Write new line
print(@Stream, @Term) Write a term
put_byte(@Stream, +ByteCode) Write a byte
put_char(@Stream, +Char) Write a character
put_code(@Stream, CharCode) Write a character
read(@Stream, ?Term) Read a term
read_term(@Stream, ?Term, @Options) Read a term with control options
skip_line(@Stream) Skip input line

write(@Stream, @Term) Write a term
write_canonical(@Stream, @Term) Write a term in normal structure representation and
in single quotes
write_formatted(@Stream,
+Format, @TermList) Write terms with formatting

write_term(@Stream, @Term, @Options) Write a term using operator notation
writeq(@Stream, @Term) Write a term in single quotes, using operator notation
1cmi [t]13cmKeyboard inputs are usually buffered one line at a time and are passed to
the Prolog system when is pressed. Output to files and pipes is usually also buffered. If
necessary, you can clear the output buffers with flush_output/0/1. You can manage buffering
with open/3/4.
You can utilize the predicate close/1 to close any stream despite the standard streams. Should
you effort to close a standard stream with close/1, it will have no result.

The predicate reset_streams/0 reinstates the defaults for the standard streams

Task Make distinction between Input/output using current streams and explicitly
specified streams.

Self Assessment

Fill in the blanks:
17. Input/output predicates in which no stream is mentioned address the .........................
streams.

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