Varianti

    FE_DOWNWARD, FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD

    Da cppreference.com.
    < c | numeric | fenv

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    <metanoindex/>

     
    C
     
    Numeri
     
    Floating point ambiente
    Funzioni
    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)
    Macro costanti
    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>
    Elemento definito nell'header <<fenv.h>>
    #define FE_DOWNWARD /*implementation defined*/
    #define FE_TONEAREST /*implementation defined*/
    #define FE_TOWARDZERO /*implementation defined*/
    #define FE_UPWARD /*implementation defined*/
    Ciascuna di queste costanti macro restituisce un negativo espressione intero costante, che può utilizzare con me fesetround e fegetround per indicare uno dei supportate virgola mobile modalità di arrotondamento. L'applicazione può definire ulteriori costanti modalità di arrotondamento nel <fenv.h>, che dovrebbero iniziare con FE_ seguita da almeno una lettera maiuscola. Ogni macro è definito solo se supportato.
    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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    Sulla maggior parte delle implementazioni, queste costanti macro espandere i valori uguali ai valori di FLT_ROUNDS e float_round_style
    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
    arrotondamento verso l'infinito negativo
    Original:
    rounding towards negative infinity
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    FE_TONEAREST
    arrotondamento verso l'intero più vicino
    Original:
    rounding towards nearest integer
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    FE_TOWARDZERO
    arrotondamento verso lo zero
    Original:
    rounding towards zero
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    FE_UPWARD
    arrotondamento verso l'infinito positivo
    Original:
    rounding towards positive infinity
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    Ulteriori modalità di arrotondamento può essere supportato da una implementazione.
    Original:
    Additional rounding modes may be supported by an implementation.
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    Esempio

    This section is incomplete
    Reason: no example

    Vedi anche

    (C99)
    (C99)
    ottiene o imposta la direzione di arrotondamento
    Original:
    gets or sets rounding direction
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    (funzione) [modifica]
    C++ documentation for floating point rounding macros