isless.3m (2010 09)

i
isless(3M) isless(3M)
NAME
isless( ) - floating-point quiet 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 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
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). The macro raises no floating-point exceptions.
ERRORS
No errors are defined.
SEE ALSO
isgreater(3M), isgreaterequal(3M), islessequal(3M), islessgreater(3M), isunordered(3M), math(5).
STANDARDS CONFORMANCE
isless(): ISO/IEC C99
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1