NAME
atof —
convert ASCII string to
double
SYNOPSIS
#include
<stdlib.h>
double
atof(const
char *nptr);
DESCRIPTION
Theatof()
function converts the initial portion of the string pointed to by
nptr to double representation.
It is equivalent to:
strtod(nptr, (char **)NULL);
SEE ALSO
STANDARDS
The atof() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
BUGS
This manual page represents intent instead of actual practice.
While it is intended that atof() be implemented
using strtod(3), this has not yet happened. In the current system,
atof() translates a string in the following form to
a double: a string of leading white space, possibly followed by a sign
(``+'' or ``-''), followed by a digit string which may contain one decimal
point (``.''), which may be followed by either of the exponent flags (``E''
or ``e''), and lastly, followed by a signed or unsigned integer.