Namespace
Varianti

scalbn, scalbln

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
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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		(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
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Power functions
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sqrt
cbrt(C99)
hypot(C99)
pow
Funzioni trigonometriche e iperboliche
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C99)
acosh(C99)
atanh(C99)
Errore e gamma funzioni
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Error and gamma functions
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erf(C99)
erfc(C99)
lgamma(C99)
tgamma(C99)
Più vicini operazioni di interi in virgola mobile
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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
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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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Elemento definito nell'header <cmath>
float       scalbnf( float x, int exp );
double      scalbn( double x, int exp );
long double scalbnl( long double x, int exp );
float       scalblnf( float x, long exp );
double      scalbln( double x, long exp );
long double scalblnl( long double x, long exp );
Moltiplica un valore in virgola mobile x da FLT_RADIX elevato a exp potere. Il sistema binario è equivalente a ldexp().
Original:
Multiplies an floating point value x by FLT_RADIX raised to power exp. On binary system it is equivalent to ldexp().
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[modifica] Parametri

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

Restituisce x×FLT_RADIXexp.
Original:
Returns x×FLT_RADIXexp.
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Se il risultato è troppo grande per il tipo di fondo, l'errore si verifica e gamma HUGE_VAL viene restituito.
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If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.
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[modifica] Vedi anche
scompone un numero in significante e una potenza di 2
Original:
decomposes a number into significand and a power of 2
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(funzione) [modifica]
moltiplica un numero per 2 elevato a una potenza
Original:
multiplies a number by 2 raised to a power
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(funzione) [modifica]
C++ documentation for scalbn
Estratto da "https://it.cppreference.com/mwiki/index.php?title=c/numeric/math/scalbn&oldid=24746"