NAME
islessequal() — floating-point comparison macro (<=)
SYNOPSIS
#include <math.h>
int islessequal(
floating-expr
x,
floating-expr
y);
DESCRIPTION
The
islessequal()
macro determines whether its first argument is less than or equal
to its second argument. The value of
islessequal(x,y)
is always equal to
(x) <= (y);
however, unlike
(x) <= (y),
islessequal(x,y)
does not raise the invalid exception when
x
and
y
are unordered.
The macro can be used with either
double
or
float
arguments.
The ISO/ANSI C committee has approved the
islessequal()
macro for inclusion in the C9X draft standard.
To use the
islessequal()
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
islessequal()
macro returns the value of
(x) <= (y).
ERRORS
No errors are defined.
