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FPCLASSIFY(P)			    POSIX Programmer's Manual			    FPCLASSIFY(P)

NAME
       fpclassify - classify real floating type

SYNOPSIS
       #include <math.h>

       int fpclassify(real-floating x);

DESCRIPTION
       The fpclassify() macro shall classify its argument value as NaN, infinite, normal, subnor-
       mal, zero, or into another implementation-defined category. First, an argument represented
       in a format wider than its semantic type is converted to its semantic type. Then classifi-
       cation is based on the type of the argument.

RETURN VALUE
       The fpclassify() macro shall return the value of the number classification macro appropri-
       ate to the value of its argument.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       isfinite()  ,  isinf() , isnan() , isnormal() , signbit() , the Base Definitions volume of
       IEEE Std 1003.1-2001, <math.h>

COPYRIGHT
       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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				    FPCLASSIFY(P)
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