fpclassify Macro

Purpose

Classifies real floating type.

Syntax

#include <math.h>

int fpclassify(x)
real-floating x;

Description

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.

Parameters

Return Values

The fpclassify macro returns the value of the number classification macro appropriate to the value of its argument.