Converts the initial part of a wide string to a specified-type floating-point number.

[Format]

#include <wchar.h>

double wcstod(const wchar_t *restrict nptr, wchar_t **restrict endptr);

float wcstof(const wchar_t *restrict nptr, wchar_t **restrict endptr);

long double wcstold(const wchar_t *restrict nptr, wchar_t **restrict endptr);

[Parameters]

nptr Pointer to a number-representing string to be converted

endptr Pointer to the storage area containing a pointer to the first character that does not represent a floating-point number

[Return Values]

Normal: f the string pointed by nptr begins with a character that does not represent a floating-point number: 0

If the string pointed by nptr begins with a character thatrepresents a floating-point number: Converted data as a specified-type floating-point number

Abnormal: If the converted data overflows: HUGE_VAL, HUGE_VALF, or HUGE_VALL with the same sign as that of the string before conversion

If the converted data underflows: 0

[Remarks]

If the converted result overflows or underflows, errno is set.

The wcstod function group is the wide-character version of the strtod function group.