Most of the functions, types, and constants listed below are documented in the Run-Time Library Reference, a section of the Visual C++ Programmer's Guide. Those that are not documented there are relatively new to wchar.h and are documented in the topics following this one.
#define
NULL
<either 0, 0L, or (void *)0>
[0 in C++]
#define WCHAR_MAX
<#if expression >= 127>
#define WCHAR_MIN
<#if expression <= 0>
#define WEOF
<
wint_t
constant expression>
wint_t btowc
(int c);
wint_t fgetwc
(FILE *stream);
wchar_t *fgetws
(wchar_t *s, int n, FILE *stream);
wint_t fputwc
(wchar_t c, FILE *stream);
int fputws
(const wchar_t *s, FILE *stream);
int fwide
(FILE *stream, int mode);
int fwprintf
(FILE *stream, const wchar_t *format, ...);
int fwscanf
(FILE *stream, const wchar_t *format, ...);
wint_t getwc
(FILE *stream);
wint_t getwchar
(void);
size_t mbrlen
(const char *s, size_t n, mbstate_t *ps);
size_t mbrtowc
(wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
int mbsinit
(const mbstate_t *ps);
size_t mbsrtowcs
(wchar_t *dst, const char **src, size_t len, mbstate_t *ps);
typedef o-type
mbstate_t
;
wint_t putwc
(wchar_t c, FILE *stream);
wint_t putwchar
(wchar_t c);
typedef ui-type
size_t
;
int swprintf
(wchar_t *s, size_t n, const wchar_t *format, ...);
int swscanf
(const wchar_t *s, const wchar_t *format, ...);
struct tm
;
wint_t ungetwc
(wint_t c, FILE *stream);
int vfwprintf
(FILE *stream, const wchar_t *format, va_list arg);
int vswprintf
(wchar_t *s, size_t n, const wchar_t *format, va_list arg);
int vwprintf
(const wchar_t *format, va_list arg);
typedef i-type
wchar_t
;
[keyword in C++]
size_t wcrtomb
(char *s, wchar_t wc, mbstate_t *ps);
wchar_t *wcscat
(wchar_t *s1, const wchar_t *s2);
wchar_t *wcschr
(const wchar_t *s, wchar_t c);
int wcscmp
(const wchar_t *s1, const wchar_t *s2);
int wcscoll
(const wchar_t *s1, const wchar_t *s2);
wchar_t *wcscpy
(wchar_t *s1, const wchar_t *s2);
size_t wcscspn
(const wchar_t *s1, const wchar_t *s2);
size_t wcsftime
(wchar_t *s, size_t maxsize, const wchar_t *format, const struct tm
*timeptr);
size_t wcslen
(const wchar_t *s);
wchar_t *wcsncat
(wchar_t *s1, const wchar_t *s2, size_t n);
int wcsncmp
(const wchar_t *s1, const wchar_t *s2, size_t n);
wchar_t *wcsncpy
(wchar_t *s1, const wchar_t *s2, size_t n);
wchar_t *wcspbrk
(const wchar_t *s1, const wchar_t *s2);
wchar_t *wcsrchr
(const wchar_t *s, wchar_t c);
size_t wcsrtombs
(char *dst, const wchar_t **src, size_t len, mbstate_t *ps);
size_t wcsspn
(const wchar_t *s1, const wchar_t *s2);
wchar_t *wcsstr
(const wchar_t *s1, const wchar_t *s2);
double wcstod
(const wchar_t *nptr, wchar_t **endptr);
wchar_t *wcstok
(wchar_t *s1, const wchar_t *s2, wchar_t **ptr);
long wcstol
(const wchar_t *nptr, wchar_t **endptr, int base);
unsigned long wcstoul
(const wchar_t *nptr, wchar_t **endptr, int base);
size_t wcsxfrm
(wchar_t *s1, const wchar_t *s2, size_t n);
int wctob
(wint_t c);
typedef i_type
wint_t
;
wchar_t *wmemchr
(const wchar_t *s, wchar_t c, size_t n);
[not in C++]
const wchar_t *wmemchr
(const wchar_t *s, wchar_t c, size_t n);
[C++ only]
wchar_t *wmemchr
(wchar_t *s, wchar_t c, size_t n);
[C++ only]
int wmemcmp
(const wchar_t *s1, const wchar_t *s2, size_t n);
wchar_t *wmemcpy
(wchar_t *s1, const wchar_t *s2, size_t n);
wchar_t *wmemmove
(wchar_t *s1, const wchar_t *s2, size_t n);
wchar_t *wmemset
(wchar_t *s, wchar_t c, size_t n);
int wprintf
(const wchar_t *format, ...);
int wscanf
(const wchar_t *format, ...);
Include the standard header <wchar.h>
so that you can perform input and output operations on wide streams or
manipulate wide strings.