HP-UX Reference (11i v1 05/09) - 3 Library Functions A-M (vol 6)

i
isless(3M) isless(3M)
NAME
isless() - floating-point comparison macro (<)
SYNOPSIS
#include <math.h>
int isless(
floating-expr x, floating-expr
y);
DESCRIPTION
The isless() macro determines whether its first argument is less than its second argument. The value
of isless(x,y) is always equal to
(x)<(y); however, unlike (x)<(
y), isless(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
isless() macro for inclusion in the C9X draft standard.
To use the
isless() 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 isless() macro returns the value of (x)<(y).
ERRORS
No errors are defined.
SEE ALSO
isgreater(3M), isgreaterequal(3M), islessequal(3M), islessgreater(3M), isunordered(3M), math(5).
Section 3−−506 Hewlett-Packard Company − 1 − HP-UX 11i Version 1: September 2005