Originální popis anglicky:
atof - convert a string to a double
Návod, kniha: Linux Programmer's Manual
#include <stdlib.h>
double atof(const char *nptr);
The
atof() function converts the initial portion of the string pointed to
by
nptr to double. The behaviour is the same as
strtod(nptr, (char **)NULL);
except that
atof() does not detect errors.
The converted value.
SVID 3, POSIX, BSD 4.3, ISO 9899
atoi(3),
atol(3),
strtod(3),
strtol(3),
strtoul(3)