ISGREATER(3) | Library Functions Manual | ISGREATER(3) |
isgreater
,
isgreaterequal
, isless
,
islessequal
, islessgreater
,
isunordered
— compare two
floating-point numbers
Standard C Library (libc, -lc)
#include
<math.h>
int
isgreater
(real-floating
x, real-floating
y);
int
isgreaterequal
(real-floating
x, real-floating
y);
int
isless
(real-floating
x, real-floating
y);
int
islessequal
(real-floating
x, real-floating
y);
int
islessgreater
(real-floating
x, real-floating
y);
int
isunordered
(real-floating
x, real-floating
y);
Each of the macros
isgreater
(),
isgreaterequal
(),
isless
(),
islessequal
(),
and
islessgreater
()
takes arguments x and y and
returns a non-zero value if and only if its nominal relation on
x and y is true. These macros
always return zero if either argument is not a number (NaN), but unlike the
corresponding C operators, they never raise a floating point exception.
The
isunordered
()
macro takes arguments x and y,
returning non-zero if either x or
y is NaN. For any pair of floating-point values, one
of the relationships (less, greater, equal, unordered) holds.
The isgreater
(),
isgreaterequal
(), isless
(),
islessequal
(),
islessgreater
(), and
isunordered
() macros conform to
ISO/IEC 9899:1999
(“ISO C99”).
December 1, 2008 | macOS 14.6 |