A/UX® Programmer's Reference Sections

putc(3S) putc(3S)
NAME
putc, putchar, fputc, putw - put character or word on a
stream
SYNOPSIS
iinclude
int putc (c, stream)
int c;
FILE *stream;
int putchar (c)
int c;
int fputc (c, stream)
int c;
FILE *stream;
int putw (w, stream)
int W;
FILE *stream;
DESCRIPTION
The putc macro writes the character c onto the output stream at
the position where the file pointer, if defined, is pointing. The
putchar macro is defined as putc (c, stdout) .
1
fputc behaves like putc, but is a function rather than a macro.
fputc runs more slowly than putc, but it takes less space per
invocation and its name can be passed as an argument to a function.
putw writes the word (32-bit integer on the Macintosh IT) w to the
output stream at the position at which the file pointer, if defined, is
pointing. putw neither assumes nor causes special alignment in
the file.
Output streams, with the exception of the standard error stream
stderr, are by default buffered if the output refers to a file and
line-buffered if the output refers to a terminal. The standard error
output stream stderr is by default unbuffered, but use of
freopen (see fopen(3S» causes it to become buffered or linebuffered.
When an output stream is unbuffered information, it is
queued for writing on the destination file or terminal as soon as
written; when it is buffered, many characters are saved up and
written as a block; when it is line-buffered, each line of output is
queued for writing on the destination terminal as soon as the line
is completed (Le., as soon as a newline character is written or ter-
February, 1990
RevisionC