fgetwc, getwc

Reads the next wide character from the given input stream. getwc ( ) may be implemented as a macro and may evaluate stream more than once.

Parameters

Return value

The next wide character from the stream or WEOF on failure.

If the failure has been caused by end-of-file condition, additionally sets the eof indicator (see feof() ) on stream . If the failure has been caused by some other error, sets the error indicator (see ferror() ) on stream .

If an encoding error occurred, additionally sets errno to EILSEQ .

Example

#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
#include <errno.h>
#include <locale.h>
 
int main(void)
{
    setlocale(LC_ALL, "en_US.utf8");
    FILE *fp = fopen("fgetwc.dat", "w");
    if(!fp) {
        perror("Can't open file for writing");
        return EXIT_FAILURE;
    }
    fputs("кошка\n", fp);
    fclose(fp);
 
    fp = fopen("fgetwc.dat", "r");
    if(!fp) {
        perror("Can't open file for reading");
        return EXIT_FAILURE;
    }
    wint_t wc;
    errno = 0;
    while ((wc = fgetwc(fp)) != WEOF)
        putwchar(wc);
 
    if (ferror(fp)) {
        if (errno == EILSEQ)
            puts("Character encoding error while reading.");
        else
            puts("I/O error when reading");
    } else if (feof(fp))
        puts("End of file reached successfully");
 
    fclose(fp);
}

кошка

References

See also