Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (v7man)
Apropos / Subsearch:
optional field

PUTC(3S)                                                              PUTC(3S)

       putc, putchar, fputc, putw - put character or word on a stream

       #include <&lt;stdio.h>&gt;

       int putc(c, stream)
       char c;
       FILE *stream;


       fputc(c, stream)
       FILE *stream;

       putw(w, stream)
       FILE *stream;

       Putc  appends  the  character c to the named output stream.  It returns
       the character written.

       Putchar(c) is defined as putc(c, stdout).

       Fputc behaves like putc, but is a genuine function rather than a macro.
       It may be used to save on object text.

       Putw  appends  word (i.e.  int) w to the output stream.  It returns the
       word written.  Putw neither assumes nor causes special alignment in the

       The standard stream stdout is normally buffered if and only if the out-
       put does not refer to a terminal; this default may be changed  by  set-
       buf(3).   The  standard stream stderr is by default unbuffered uncondi-
       tionally, but use of freopen (see fopen(3)) will  cause  it  to  become
       buffered;  setbuf,  again,  will  set the state to whatever is desired.
       When an output stream is unbuffered information appears on the destina-
       tion  file  or  terminal  as  soon as written; when it is buffered many
       characters are saved up and written as a block.  Fflush (see fclose(3))
       may be used to force the block out early.

       fopen(3), fclose(3), getc(3), puts(3), printf(3), fread(3)

       These  functions  return  the constant EOF upon error.  Since this is a
       good integer, ferror(3) should be used to detect putw errors.

       Because it is implemented as a macro, putc  treats  a  stream  argument
       with  side  effects improperly.  In particular `putc(c, *f++);' doesn't
       work sensibly.