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signbit

Da cppreference.com.
< c‎ | numeric‎ | math

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C
 
Numeri
 
Comuni funzioni matematiche
Funzioni
Original:
Functions
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Operazioni di base
Original:
Basic operations
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remainder(C99)
remquo(C99)
fma(C99)
fmax(C99)
fmin(C99)
fdim(C99)
nan
nanf
nanl		(C99)
(C99)
(C99)
Funzioni esponenziali
Original:
Exponential functions
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exp
exp2(C99)
expm1(C99)
log
log10
log1p(C99)
log2(C99)
Funzioni di risparmio energia
Original:
Power functions
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sqrt
cbrt(C99)
hypot(C99)
pow
Funzioni trigonometriche e iperboliche
Original:
Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C99)
acosh(C99)
atanh(C99)
Errore e gamma funzioni
Original:
Error and gamma functions
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erf(C99)
erfc(C99)
lgamma(C99)
tgamma(C99)
Più vicini operazioni di interi in virgola mobile
Original:
Nearest integer floating point operations
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ceil
floor
round
lround
llround		(C99)
(C99)
(C99)
trunc(C99)
nearbyint(C99)
rint
lrint
llrint		(C99)
(C99)
(C99)
Floating funzioni di manipolazione di punti
Original:
Floating point manipulation functions
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ldexp
scalbn
scalbln		(C99)
(C99)
ilogb(C99)
logb(C99)
Classificazione
Original:
Classification
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fpclassify(C99)
isfinite(C99)
isinf(C99)
isnan(C99)
isnormal(C99)
signbit(C99)
Macro costanti
Original:
Macro constants
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Elemento definito nell'header <math.h>
#define signbit(arg) /* implementation defined */
Determina se il dato floating point arg numero è negativo. La macro restituisce un valore integrale.
Original:
Determines if the given floating point number arg is negative. The macro returns an integral value.
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[modifica] Parametri

arg -
valore in virgola mobile
Original:
floating point value
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[modifica] Valore di ritorno

Diverso da zero se arg valore integrale è negativo, altrimenti ​0​
Original:
Nonzero integral value if arg is negative, ​0​ otherwise
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[modifica] Vedi anche
valore assoluto di un valore in virgola mobile (|x|)
Original:
absolute value of a floating point value (|x|)
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(funzione) [modifica]
(C99)
copia il segno di un valore in virgola mobile
Original:
copies the sign of a floating point value
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(funzione) [modifica]
C++ documentation for signbit
Estratto da "https://it.cppreference.com/mwiki/index.php?title=c/numeric/math/signbit&oldid=24747"