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Varianti

FP_NORMAL, FP_SUBNORMAL, FP_ZERO, FP_INFINITE, FP_NAN

Da cppreference.com.
< c‎ | numeric‎ | math

 
 
 
Comuni funzioni matematiche
Funzioni
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Functions
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Operazioni di base
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Basic operations
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remainder(C99)
remquo(C99)
fma(C99)
fmax(C99)
fmin(C99)
fdim(C99)
nan
nanf
nanl
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(C99)
(C99)
Funzioni esponenziali
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Exponential functions
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exp
exp2(C99)
expm1(C99)
log
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log1p(C99)
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Funzioni di risparmio energia
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Power functions
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sqrt
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Funzioni trigonometriche e iperboliche
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Trigonometric and hyperbolic functions
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sinh
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asinh(C99)
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Errore e gamma funzioni
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Error and gamma functions
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erf(C99)
erfc(C99)
lgamma(C99)
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Più vicini operazioni di interi in virgola mobile
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Nearest integer floating point operations
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ceil
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(C99)
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trunc(C99)
nearbyint(C99)
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Floating funzioni di manipolazione di punti
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Floating point manipulation functions
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ldexp
scalbn
scalbln
(C99)
(C99)
ilogb(C99)
logb(C99)
Classificazione
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Classification
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fpclassify(C99)
isfinite(C99)
isinf(C99)
isnan(C99)
isnormal(C99)
signbit(C99)
Macro costanti
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Macro constants
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN
(C99)
(C99)
(C99)
(C99)
(C99)
 
Defined in header <math.h>
#define FP_NORMAL    /*implementation defined*/
#define FP_SUBNORMAL /*implementation defined*/
#define FP_ZERO      /*implementation defined*/
#define FP_INFINITE  /*implementation defined*/
#define FP_NAN       /*implementation defined*/
Il FP_NORMAL, FP_SUBNORMAL, FP_ZERO, FP_INFINITE, FP_NAN ciascuna macro rappresentano una categoria distinta di numeri a virgola mobile. Tutti si espandono per un'espressione costante intera.
Original:
The FP_NORMAL, FP_SUBNORMAL, FP_ZERO, FP_INFINITE, FP_NAN macros each represent a distinct category of floating-point numbers. They all expand to an integer constant expression.
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Constant
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Constant
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Explanation
FP_NORMAL
indica che il valore è normale, vale a dire non è un infinito, subnormale, not-a-number o zero
Original:
indicates that the value is normal, i.e. not an infinity, subnormal, not-a-number or zero
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FP_SUBNORMAL
indica che il valore è subnormale'
Original:
indicates that the value is subnormal
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FP_ZERO
indica che il valore è zero positivo o negativo
Original:
indicates that the value is positive or negative zero
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FP_INFINITE
indica che il valore non è rappresentabile dal tipo sottostante (infinito positivo o negativo)
Original:
indicates that the value is not representable by the underlying type (positive or negative infinity)
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FP_NAN
indica che il valore non-a-numero (NaN)
Original:
indicates that the value is not-a-number (NaN)
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[modifica] Vedi anche

categorizza il valore dato in virgola mobile
Original:
categorizes the given floating point value
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(funzione) [edit]
C++ documentation for FP_categories