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strtod

Usage

   #include <stdlib.h>
   double strtod(char *nptr,char **endptr);

   ANSI

Description

   strtod converts the ASCII string pointed to by nptr to a double precision
   value. It will recognize white space then an optionally signed string of
   digits containing an optional decimal point. It will stop reading the
   string at the first character that doesn t represent a part of the
   number. A pointer to that character will be stored in the object endptr
   if endptr is not NULL.

Example 

   See strtoul

Return Value

   If correct values would cause an overflow, plus or minus HUGE_VAL is
   returned according to the sign and errno is set to ERANGE. If an
   unrecognized character is encountered before a legal character, zero is
   returned. If underflow then 0 is returned and errno is set to ERANGE.

See Also

   atof, scanf