function obtains the next input character (if present) from the stream
pointed at by
or the next character pushed back on the stream via
function acts essentially identically to
but is a macro that expands in-line.
function is equivalent to
with the argument
function obtains the next
from the stream pointed at by
If successful, these routines return the next requested object from the
If the stream is at end-of-file or a read error occurs, the routines return
must be used to distinguish between end-of-file and error.
If an error occurs, the global variable
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
until the condition is cleared with
functions conform to
is a valid integer value,
must be used to check for failure after calling
Since the size and byte order of an
may vary from one machine to another,
is not recommended for portable applications.