#include <stdlib.h>
double strtod(const char *nptr,
char **endptr);
The strtod() function
converts the string pointed by nptr to double
representation. This function recognizes (in order) an optional
string of spaces, an optional sign, a string of digits optionally
containing a radix character, an optional 'e' or
'E', and then an optionally signed
integer. The first unrecognized character ends the string. A
pointer to this unrecognized character is stored in the object
addressed by endptr, if endptr
is not NULL.
The radix character for strtod()
is that defined by the last successful call to
setlocale(), category LC_NUMERIC.
If setlocale(), category LC_NUMERIC,
has not been called successfully, or if
the radix is not defined for a supported language, the radix
character is defined as a period (.).
- nptr
-
Points to a character string for strtod() to convert.
- endptr
-
Is a result parameter that, if not NULL, is loaded with the address
of the first character that strtod() does not attempt
to convert.
The strtod() function
returns the converted value, if there is any. If no conversion
could be performed, strtod() returns zero. If the correct
value is outside the range of representable values (plus or minus),
strtod() returns HUGE_VAL (according to
the sign of the value) and sets errno to ERANGE. If
the correct value causes underflow, strtod() returns zero
and sets errno to ERANGE.
ANSI/ISO 9899-1990.
MT-Safe, with exceptions.
This function is MT-Safe as long as no thread calls setlocale() while
this function is executing.
None.
MKS Toolkit for Professional Developers
MKS Toolkit for Enterprise Developers
MKS Toolkit for Enterprise Developers 64-Bit Edition
- Functions:
- atof(), setlocale(), strtol(), strtoul()
MKS Toolkit 9.2 Documentation Build 16.