Originální popis anglicky:
fpclassify - classify real floating type
Návod, kniha: POSIX Programmer's Manual
#include <math.h>
int fpclassify(real-floating
x);
The
fpclassify() macro shall classify its argument value as NaN,
infinite, normal, subnormal, 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 classification is based on the
type of the argument.
The
fpclassify() macro shall return the value of the number
classification macro appropriate to the value of its argument.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
isfinite() ,
isinf() ,
isnan() ,
isnormal() ,
signbit() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<math.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
.
