fputc,
putc,
putchar,
putw —
output a character or word to a stream
#include
<stdio.h>
int
fputc(
int
c,
FILE
*stream);
int
putc(
int
c,
FILE
*stream);
int
putchar(
int
c);
int
putw(
int
w,
FILE
*stream);
The
fputc() function writes the character
c (converted to an
unsigned
char) to the output stream pointed to by
stream.
putc() acts essentially identically to
fputc(), but is a macro that expands
in-line. It may evaluate
stream more than
once, so arguments given to
putc() should
not be expressions with potential side effects.
putchar() is identical to
putc() with an output stream of
stdout.
The
putw() function writes the specified
int w to the named
output
stream.
The functions
fputc(),
putc(), and
putchar() return the character written. If
an error occurs, the value
EOF is returned
and the global variable
errno is set to
indicate the error. The
putw() function
returns 0 on success;
EOF is returned if a
write error occurs, or if an attempt is made to write a read-only stream. The
global variable
errno may be set to indicate
the error.
The function
putw() may also fail and set
errno for any of the errors specified for the
routines
write(2) or
realloc(3).
ferror(3),
fopen(3),
getc(3),
putwc(3),
stdio(3)
The functions
fputc(),
putc(), and
putchar(), conform to
ANSI X3.159-1989
(“ANSI C89”).
The
putc() and
putw() functions first appeared in
Version 1 AT&T UNIX;
putchar() in
Version 2 AT&T UNIX; and
fputc() in
Version 7 AT&T UNIX.
Since the size and byte order of an
int may vary from
one machine to another,
putw() is not
recommended for portable applications.
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