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    FE_DOWNWARD, FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD

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    < c | numeric | fenv

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    <metanoindex/>

     
    C
     
    Numerics
     
    Fließkomma-Umgebung
    Funktionen
    Original:
    Functions
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    feclearexcept(C99)
    fetestexcept(C99)
    feraiseexcept(C99)
    fegetexceptflag
    fesetexceptflag    		(C99)
    (C99)
    fegetround
    fesetround    		(C99)
    (C99)
    fegetenv
    fesetenv    		(C99)
    feholdexcept(C99)
    feupdateenv(C99)
    Makro Konstanten
    Original:
    Macro constants
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    FE_ALL_EXCEPT
    FE_DIVBYZERO
    FE_INEXACT
    FE_INVALID
    FE_OVERFLOW
    FE_UNDERFLOW    		(C99)
    FE_DOWNWARD
    FE_TONEAREST
    FE_TOWARDZERO
    FE_UPWARD    		(C99)
    FE_DFL_ENV(C99)
     
    <tbody> </tbody>
    definiert in Header <<fenv.h>>
    #define FE_DOWNWARD /*implementation defined*/
    #define FE_TONEAREST /*implementation defined*/
    #define FE_TOWARDZERO /*implementation defined*/
    #define FE_UPWARD /*implementation defined*/
    Jede dieser Makro-Konstanten weitet sich zu einer nichtnegativen Ganzzahlkonstantenausdruck, die mich mit verwendet fesetround und fegetround zu einem der unterstützten Floating-Point-Rundungsmodi anzuzeigen. Die Implementierung kann zusätzliche Rundungsmodus Konstanten in <fenv.h> definieren, die alle sollten beginnen mit FE_ von mindestens einem Großbuchstaben gefolgt. Jedes Makro wird nur definiert, wenn sie unterstützt wird .
    Original:
    Each of these macro constants expands to a nonnegative integer constant expression, which can me used with fesetround and fegetround to indicate one of the supported floating-point rounding modes. The implementation may define additional rounding mode constants in <fenv.h>, which should all begin with FE_ followed by at least one uppercase letter. Each macro is only defined if it is supported.
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    Am meisten Implementierungen diese Makro-Konstanten mit den Werten gleich den Werten der FLT_ROUNDS und float_round_style erweitern
    Original:
    On most implementations, these macro constants expand to the values equal to the values of FLT_ROUNDS and float_round_style
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    Constant
    Original:
    Constant
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    		 Explanation
    FE_DOWNWARD
    Rundung in Richtung minus unendlich
    Original:
    rounding towards negative infinity
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    FE_TONEAREST
    Rundung zur nächsten ganzen Zahl
    Original:
    rounding towards nearest integer
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    FE_TOWARDZERO
    Rundung in Richtung Null
    Original:
    rounding towards zero
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    FE_UPWARD
    Rundung in Richtung plus unendlich
    Original:
    rounding towards positive infinity
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    Zusätzliche Rundungsmodi kann durch eine Implementierung unterstützt werden .
    Original:
    Additional rounding modes may be supported by an implementation.
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    Beispiel

    This section is incomplete
    Reason: no example

    Siehe auch

    (C99)
    (C99)
    ab oder legt Rundung Richtung
    Original:
    gets or sets rounding direction
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    (Funktion) [edit]
    C++ documentation for floating point rounding macros