Namespace
Varianti

FE_DOWNWARD, FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD

Da cppreference.com.
< cpp‎ | numeric‎ | fenv

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C++
 
Numeri libreria
Comuni funzioni matematiche
Virgola mobile ambiente
I numeri complessi
Array numerici
Pseudo-casuale generazione
In fase di compilazione aritmetica razionale (C++11)
Generici operazioni numeriche
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Virgola mobile ambiente
Funzioni
Original:
Functions
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feclearexcept(C++11)
fetestexcept(C++11)
feraiseexcept(C++11)
fegetexceptflag
fesetexceptflag		(C++11)
(C++11)
fegetround
fesetround		(C++11)
(C++11)
fegetenv
fesetenv		(C++11)
feholdexcept(C++11)
feupdateenv(C++11)
Macro costanti
Original:
Macro constants
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FE_ALL_EXCEPT
FE_DIVBYZERO
FE_INEXACT
FE_INVALID
FE_OVERFLOW
FE_UNDERFLOW		(C++11)
FE_DOWNWARD
FE_TONEAREST
FE_TOWARDZERO
FE_UPWARD		(C++11)
FE_DFL_ENV(C++11)
 
Elemento definito nell'header <cfenv>
#define FE_DOWNWARD     /*implementation defined*/
 (dal C++11)
#define FE_TONEAREST    /*implementation defined*/
 (dal C++11)
#define FE_TOWARDZERO   /*implementation defined*/
 (dal C++11)
#define FE_UPWARD       /*implementation defined*/
 (dal C++11)
Ciascuna di queste costanti macro restituisce un negativo espressione intero costante, che può utilizzare con me std::fesetround e std::fegetround per indicare uno dei supportate virgola mobile modalità di arrotondamento. L'applicazione può definire ulteriori costanti modalità di arrotondamento nel <cfenv>, 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 std::fesetround and std::fegetround to indicate one of the supported floating-point rounding modes. The implementation may define additional rounding mode constants in <cfenv>, 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 std::float_round_style
Original:
On most implementations, these macro constants expand to the values equal to the values of FLT_ROUNDS and std::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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