isunordered.3m (2010 09)

isunordered(3M) isunordered(3M)

NAME

isunordered( ) - ﬂoating-point comparison macro (unordered)

SYNOPSIS

#include <math.h>

int isunordered(ﬂoating-expr x, ﬂoating-expr y);

DESCRIPTION

The isunordered()

macro determines whether its arguments are unordered. The arguments are

unordered if at least one argument is a NaN.

The arguments must be of ﬂoating type. For HP Integrity servers, the arguments can be any ﬂoating

type. For PA-RISC, each argument must be either

double or float.

USAGE

To use the

isunordered()

macro, compile either with the default -Ae

option or with the -Aa and

-D_HPUX_SOURCE

options. Make sure your program includes <math.h>. Link in the math library by

specifying

-lm on the compiler or linker command line.

RETURN VALUE

The

isunordered() macro returns 1 if its arguments are unordered (that is, if either argument is a

NaN) and 0 otherwise. The macro raises no ﬂoating-point exceptions.

ERRORS

No errors are deﬁned.

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isunordered(3M) isunordered(3M) NAME isunordered( ) - floating-point comparison macro (unordered) SYNOPSIS #include int isunordered(floating-expr x, floating-expr y); DESCRIPTION The isunordered() macro determines whether its arguments are unordered. The arguments are unordered if at least one argument is a NaN. The arguments must be of floating type. For HP Integrity servers, the arguments can be any floating type. For PA-RISC, each argument must be either double or float.
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(Notes) A (Notes) iA 2 Hewlett-Packard Company −1− HP-UX 11i Version 3: September 2010