These functions use the header .
Wide-Character Conversion Functions and Their char Equivalents
Functionchar Equivalent
size_t wcsftime(wchar_t *str, size_t max, const wchar_t *fmt, const struct tm *ptr)strftime()
double wcstod(const wchar_t *start, wchar_t **end);strtod()
float wcstof(const wchar_t * restrict start, wchar_t ** restrict end);strtof()
long double wcstold(const wchar_t * restrict start, wchar_t ** restrict end);strtold()
long int wcstol(const wchar_t *start, wchar_t **end,int radix)strtol()
long long int wcstoll(const wchar_t * restrict start,wchar_t ** restrict end,int radix)strtoll()
unsigned long int wcstoul(const wchar_t * restrict start, wchar_t ** restrict end,int radix)strtoul()
unsigned long long int wcstoull( const wchar_t *start, wchar_t **end, int radix)Strtoull()
(C: The Complete Reference, Fourth Edition by Herbert Schildt McGraw-Hill/Osborne 2000
ISBN-10: 0072121246, ISBN-13: 978-0072121247)