### getwchar -- Get Wide Character from stdin

Format

>     #include <wchar.h>
>     wint_t getwchar(void);

Language Level: ANSI, XPG4
getwchar reads the next multibyte character from stdin, converts it to a wide character, and advances the associated file position indicator for stdin. A call to getwchar is equivalent to a call to getwc(stdin).

The behavior of getwchar is affected by the LC_CTYPE category of the current locale. If you change the category between subsequent read operations on the same stream, undefined results can occur.

Using non-wide-character functions with getwchar on STDIN results in undefined behavior.

Return Value
getwchar returns the next wide character from stdin or WEOF. If getwchar encounters EOF, it sets the EOF indicator for the stream and returns WEOF. If a read error occurs, the error indicator for the stream is set and getwchar returns WEOF. If an encoding error occurs during the conversion of the multibyte character to a wide character, getwchar sets errno to EILSEQ and returns WEOF.

Use ferror or feof to determine whether an error or an EOF condition occurred. EOF is only reached when an attempt is made to read past the last byte of data. Reading up to and including the last byte of data does not turn on the EOF indicator.

Example
This example uses getwchar to read wide characters from the keyboard, then prints the wide characters.

    #include <errno.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <wchar.h>

    int main(void)
    {
       wint_t  wc;

       errno = 0;
       while (WEOF != (wc = getwchar()))
          printf("wc = %lc\n", wc);

       if (EILSEQ == errno) {
          printf("An invalid wide character was encountered.\n");
          exit(1);
       }
       return 0;

       /***************************************************************
          Assuming you enter: abcde^Z            (note: ^Z is CNTRL-Z)

          The output should be:

          wc = a
          wc = b
          wc = c
          wc = d
          wc = e
       ***************************************************************/
    }

fgetc -- Read a Character
_fgetchar -- Read Single Character from stdin
getc - getchar -- Read a Character
_getch - _getche -- Read Character from Keyboard
getwc -- Read Wide Character from Stream
<wchar.h>