fgetwc
From cppreference.com
Defined in header <wchar.h>
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wint_t fgetwc( FILE *stream ); |
(since C95) | |
wint_t getwc( FILE *stream ); |
(since C95) | |
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
stream | - | to read the wide character from |
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
Run this code
#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); }
Output:
кошка
References
- C11 standard (ISO/IEC 9899:2011):
- 7.29.3.1 The fgetwc function (p: 421-422)
- 7.29.3.6 The getwc function (p: 424)
- C99 standard (ISO/IEC 9899:1999):
- 7.24.3.1 The fgetwc function (p: 367)
- 7.24.3.6 The getwc function (p: 369)
See also
gets a character from a file stream (function) | |
(C95) |
gets a wide string from a file stream (function) |
(C95) |
writes a wide character to a file stream (function) |
(C95) |
puts a wide character back into a file stream (function) |