ungetc
extern int ungetc(int c, FILE *stream);
extern int ungetc(int c, FILE *stream);
ungetc(c,file);
ungetc (c, fp);
ungetc('\n', fp);
ungetc(c, fp); /*%< return the charcter to the input field */
weak_alias (_IO_ungetc, ungetc)
extern int ungetc (int __c, FILE *__stream);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
ungetc (c, s);
} else if (ungetc('9', fp) == EOF) {
ASSERT(ungetc(ch, fp) == ch);
ASSERT(ungetc(ch, fp) == ch);
ASSERT(ungetc('!', fp) == '!');
ASSERT(ungetc('#', fp) == '#');
ASSERT(ungetc('x', fp) == 'x');
ASSERT(ungetc('y', fp) == 'y');
ASSERT(ungetc('x', fp) == 'x');
ASSERT(ungetc('y', fp) == 'y');
ASSERT(ungetc(' ', fp) == ' ');
ASSERT(ungetc(' ', fp) == ' ');