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isgreater(3p) — Linux manual page

ISGREATER(3P)           POSIX Programmer's ManualISGREATER(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-floatingx, real-floatingy);

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

RETURN VALUE        top

       Upon successful completion, theisgreater() macro shall return the       value of (x) > (y).       Ifx ory is NaN, 0 shall be returned.

ERRORS        top

       No errors are defined.The following sections are informative.

EXAMPLES        top

       None.

APPLICATION USAGE        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-floatingindicates that the argument shall be an       expression ofreal-floatingtype.

RATIONALE        top

       None.

FUTURE DIRECTIONS        top

       None.

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 athttp://www.opengroup.org/unix/online.html .       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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017ISGREATER(3P)

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

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