Originální popis anglicky:
atof - convert a string to a double-precision number
Návod, kniha: POSIX Programmer's Manual
#include <stdlib.h>
double atof(const char *
str);
The call
atof(
str) shall be equivalent to:
strtod(str,(char **)NULL),
except that the handling of errors may differ. If the value cannot be
represented, the behavior is undefined.
The
atof() function shall return the converted value if the value can be
represented.
No errors are defined.
The following sections are informative.
None.
The
atof() function is subsumed by
strtod() but is retained
because it is used extensively in existing code. If the number is not known to
be in range,
strtod() should be used because
atof() is not
required to perform any error checking.
None.
None.
strtod() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<stdlib.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
