isgreater(3p) — Linux manual page


ISGREATER(3P)           POSIX Programmer's Manual          ISGREATER(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior),
       or the interface may not be implemented on Linux.

NAME         top

       isgreater — test if x greater than y

SYNOPSIS         top

       #include <math.h>

       int isgreater(real-floating x, real-floating y);

DESCRIPTION         top

       The functionality described on this reference page is aligned
       with the ISO C standard. Any conflict between the requirements
       described here and the ISO C standard is unintentional. This
       volume of POSIX.1‐2017 defers to the ISO C standard.

       The isgreater() macro shall determine whether its first argument
       is greater than its second argument. The value of isgreater(x, y)
       shall be equal to (x) > (y); however, unlike (x) > (y),
       isgreater(x, y) shall not raise the invalid floating-point
       exception when x and y are unordered.

RETURN VALUE         top

       Upon successful completion, the isgreater() macro shall return
       the value of (x) > (y).

       If x or y is NaN, 0 shall be returned.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top



       The relational and equality operators support the usual
       mathematical relationships between numeric values. For any
       ordered pair of numeric values, exactly one of the relationships
       (less, greater, and equal) is true. Relational operators may
       raise the invalid floating-point exception when argument values
       are NaNs. For a NaN and a numeric value, or for two NaNs, just
       the unordered relationship is true. This macro is a quiet (non-
       floating-point exception raising) version of a relational
       operator. It facilitates writing efficient code that accounts for
       NaNs without suffering the invalid floating-point exception. In
       the SYNOPSIS section, real-floating indicates that the argument
       shall be an expression of real-floating type.

RATIONALE         top




SEE ALSO         top

       isgreaterequal(3p), isless(3p), islessequal(3p),
       islessgreater(3p), isunordered(3p)

       The Base Definitions volume of POSIX.1‐2017, math.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any
       discrepancy between this version and the original IEEE and The
       Open Group Standard, the original IEEE and The Open Group
       Standard is the referee document. The original Standard can be
       obtained online at .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see .

IEEE/The Open Group               2017                     ISGREATER(3P)

Pages that refer to this page: math.h(0p)isgreaterequal(3p)isless(3p)islessequal(3p)islessgreater(3p)isunordered(3p)