Classifies real floating type.
#include <math.h> int fpclassify(x) real-floating x;
The fpclassify macro classifies the x parameter as NaN, infinite, normal, subnormal, zero, or into another implementation-defined category. An argument represented in a format wider than its semantic type is converted to its semantic type. Classification is based on the type of the argument.
| x | Specifies the value to be classified. |
The fpclassify macro returns the value of the number classification macro appropriate to the value of its argument.
isfinite Macro, isinf Subroutine, class, _class, finite, isnan, or unordered Subroutines, isnormal Macro.
The signbit Subroutine in AIX 5L Version 5.2 Technical Reference: Base Operating System and Extensions Volume 2.
math.h in AIX 5L Version 5.2 Files Reference.