Defined in header
wint_t ungetc( wint_t ch, FILE *stream );
Puts the wide character
ch back to the given file stream.
Only one wide character pushback is guaranteed.
|ch||-||wide character to be put back|
|stream||-||file stream to put the wide character back to|
ch is returned.
On failure WEOF is returned and the given stream remains unchanged.
C documentation for ungetwc