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put(+Stream, +Ascii)

The character represented by the ascii integer code Ascii is put onto the buffered output stream Stream.
Stream
Integer (stream number) or Atom (reserved or user-defined symbolic stream name).
Ascii
Integer.

Description

Puts the character represented by the integer ASCII code Ascii (in the range 0 to 255) onto the buffered output stream Stream.

The output from put/2 is buffered first, and is only output to the stream when the output is flushed (e.g. using flush/1).

ASCII codes for the non-printable characters (i.e. control characters) are also acceptable.

Modes and Determinism

Exceptions

(4) instantiation fault
Stream is not instantiated.
(4) instantiation fault
Ascii is not instantiated.
(5) type error
Stream is neither an integer nor an atom.
(5) type error
Ascii is instantiated, but not to an integer.
(192) illegal stream mode
Stream is not an output stream.
(193) illegal stream specification
Stream is an illegal stream specification.

Examples

Success:
      [eclipse]: put(output, 0'a).
      a
      yes.

      [eclipse]: sh('cat file1').
      a
      yes.
      [eclipse]: open(file1,read,s1),
      >        open(file2,write,s2),repeat,
      > (at_eof(s1)->!,
      >             flush(s2),
      >             close(s1),close(s2)
      >            ;
      >             get(s1,Char),
      >             put(s2,Char),
      >             fail).
      Char = _g72
      yes.
      [eclipse]: sh('cat file2').
      a
      yes.

Error:
      put(output,A).             (Error 4).
      put(Stream,98).            (Error 4).
      put(output, '98').         (Error 5).
      put(output, 98.0).         (Error 5).
      put("string" A).           (Error 5).
      put(11,97).                (Error 192). % stream not open
      put(atom,97).              (Error 193).



See Also

get / 1, get / 2, put / 1, nl / 1