NAME
islessgreater() — floating-point comparison macro (<>)
SYNOPSIS
#include <math.h>
int islessgreater(
floating-expr
x,
floating-expr
y);
DESCRIPTION
The
islessgreater()
macro determines whether its first argument is less than or greater
than its second argument. The value of
islessgreater(x,y)
is always equal to
(x) < (y) || (
x) > (y);
however,
islessgreater(x,y)
does not raise the invalid exception when
x
and
y
are unordered (nor does it evaluate
x
and
y
twice).
The macro can be used with either
double
or
float
arguments.
The ISO/ANSI C committee has approved the
islessgreater()
macro for inclusion in the C9X draft standard.
To use the
islessgreater()
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
islessgreater()
macro returns the value of
(x) < (y) || (
x) > (y).
ERRORS
No errors are defined.
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