UNGETC(3S)UNGETC(3S)NAMEungetc - push character back into input stream
SYNOPSIS
#include <stdio.h>
int ungetc(int c, FILE *stream);
DESCRIPTION
Ungetc pushes the character c (converted to an unsigned char) back on
an input stream. That character will be returned by the next getc call
on that stream.
One character of pushback is guaranteed provided something has been
read from the stream and the stream is actually buffered. Attempts to
push EOF are rejected.
Fseek(3S), fsetpos(3S), or rewind(3S) erases all memory of pushed back
characters.
RETURN VALUE
Ungetc returns the character pushed back after conversion, or EOF if
unsuccessful.
SEE ALSOgetc(3S), setbuf(3S), fseek(3S), fsetpos(3S), rewind(3S)
August 1, 1992 UNGETC(3S)