NAME
fgetc, getc,
getchar, getw —
get next character or word from input
stream
SYNOPSIS
#include
<stdio.h>
int
fgetc(FILE
*stream);
int
getc(FILE
*stream);
int
getchar();
int
getw(FILE
*stream);
DESCRIPTION
Thefgetc()
function obtains the next input character (if present) from the stream pointed
at by stream, or the next character pushed back on the
stream via ungetc.
The
getc()
function acts essentially identically to fgetc(),
but is a macro that expands in-line.
The
getchar()
function is equivalent to: getc with the argument stdin.
The
getw()
function obtains the next int (if present) from the stream
pointed at by stream.
RETURN VALUES
If successful, these routines return the next requested object
from the stream. If the stream is at end-of-file or a
read error occurs, the routines return EOF. The
routines feof(3) and
ferror(3) must be used to distinguish between end-of-file and error.
If an error occurs, the global variable errno is set
to indicate the error. The end-of-file condition is remembered, even on a
terminal, and all subsequent attempts to read will return
EOF until the condition is cleared with
clearerr.
SEE ALSO
STANDARDS
The fgetc(),
getc() and getchar()
functions conform to ANSI X3.159-1989
(“ANSI C89”).
BUGS
Since EOF is a valid integer value,
feof and
ferror must be used to check
for failure after calling getw(). The size and byte
order of an int varies from one machine to another, and
getw() is not recommended for portable
applications.