1ATOF(P)                    POSIX Programmer's Manual                   ATOF(P)
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NAME

6       atof - convert a string to a double-precision number
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SYNOPSIS

9       #include <stdlib.h>
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11       double atof(const char *str);
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DESCRIPTION

15       The call atof(str) shall be equivalent to:
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18              strtod(str,(char **)NULL),
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20       except  that  the handling of errors may differ. If the value cannot be
21       represented, the behavior is undefined.
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RETURN VALUE

24       The atof() function shall return the converted value if the  value  can
25       be represented.
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ERRORS

28       No errors are defined.
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30       The following sections are informative.
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EXAMPLES

33       None.
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APPLICATION USAGE

36       The  atof() function is subsumed by strtod() but is retained because it
37       is used extensively in existing code. If the number is not known to  be
38       in  range,  strtod()  should  be used because atof() is not required to
39       perform any error checking.
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RATIONALE

42       None.
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FUTURE DIRECTIONS

45       None.
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SEE ALSO

48       strtod()  ,  the  Base  Definitions  volume  of   IEEE Std 1003.1-2001,
49       <stdlib.h>
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52       Portions  of  this text are reprinted and reproduced in electronic form
53       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
54       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
55       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
56       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
57       event of any discrepancy between this version and the original IEEE and
58       The  Open Group Standard, the original IEEE and The Open Group Standard
59       is the referee document. The original Standard can be  obtained  online
60       at http://www.opengroup.org/unix/online.html .
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64IEEE/The Open Group                  2003                              ATOF(P)
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