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std::pow

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< cpp‎ | numeric‎ | math

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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
 
Comuni funzioni matematiche
Funzioni
Original:
Functions
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Operazioni di base
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Basic operations
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remainder(C++11)
remquo(C++11)
fma(C++11)
fmax(C++11)
fmin(C++11)
fdim(C++11)
nan
nanf
nanl		(C++11)
(C++11)
(C++11)
Funzioni esponenziali
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Exponential functions
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exp
exp2(C++11)
expm1(C++11)
log
log10
log1p(C++11)
log2(C++11)
Funzioni di risparmio energia
Original:
Power functions
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sqrt
cbrt(C++11)
hypot(C++11)
pow
Funzioni trigonometriche e iperboliche
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C++11)
acosh(C++11)
atanh(C++11)
Errore e gamma funzioni
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Error and gamma functions
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erf(C++11)
erfc(C++11)
lgamma(C++11)
tgamma(C++11)
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		(C++11)
(C++11)
(C++11)
trunc(C++11)
nearbyint(C++11)
rint
lrint
llrint		(C++11)
(C++11)
(C++11)
Floating funzioni di manipolazione di punti
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Floating point manipulation functions
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ldexp
scalbn
scalbln		(C++11)
(C++11)
ilogb(C++11)
logb(C++11)
frexp
modf
nextafter
nexttoward		(C++11)
(C++11)
copysign(C++11)
Classificazione / confronto
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Classification/Comparison
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fpclassify(C++11)
isfinite(C++11)
isinf(C++11)
isnan(C++11)
isnormal(C++11)
signbit(C++11)
isgreater(C++11)
isgreaterequal(C++11)
isless(C++11)
islessequal(C++11)
islessgreater(C++11)
isunordered(C++11)
Macro costanti
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Macro constants
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN		(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
 
Elemento definito nell'header <cmath>
float       pow( float base, float exp );
 (1)
double      pow( double base, double exp );
 (2)
long double pow( long double base, long double exp );
 (3)
Promoted    pow( Arithmetic base, Arithmetic exp );
 (4) (dal C++11)
float       pow( float base, int iexp );
 (5) (fino al c++11)
double      pow( double base, int iexp );
 (6) (fino al c++11)
long double pow( long double base, int iexp );
 (7) (fino al c++11)
Calcola il valore di base elevato alla potenza exp o iexp.
Original:
Computes the value of base raised to the power exp or iexp.
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4)
Un insieme di sovraccarichi o un modello di funzione per tutte le combinazioni di argomenti di tipo aritmetico non coperta da 1-3). Se un qualsiasi argomento è di tipo integrale, il cast double. Se uno degli argomenti è long double, il Promoted tipo di ritorno è anche long double, altrimenti il ​​tipo di ritorno è sempre double.
Original:
A set of overloads or a function template for all combinations of arguments of arithmetic type not covered by 1-3). If any argument has integral type, it is cast to double. If any argument is long double, then the return type Promoted is also long double, otherwise the return type is always double.
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Indice

[modifica] Parametri

base -
base come valore in virgola mobile
Original:
base as floating point value
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exp -
esponente come valore in virgola mobile
Original:
exponent as floating point value
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iexp -
esponente come valore intero
Original:
exponent as integer value
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[modifica] Valore di ritorno

base sollevato dal potere (exp o iexp).
Original:
base raised by power (exp or iexp).
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Errore di dominio si verifica se base è 0 e exp è inferiore o uguale a ​0​. NAN viene restituito in questo caso.
Original:
Domain error occurs if base is 0 and exp is less than or equal to ​0​. NAN is returned in that case.
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Errore di dominio si verifica se base è negativo e exp non è un valore intero. NAN viene restituito in questo caso.
Original:
Domain error occurs if base is negative and exp is not an integer value. NAN is returned in that case.
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Campo errore si verifica se un overflow avviene. HUGEVAL viene restituito in questo caso.
Original:
Range error occurs if an overflow takes place. HUGEVAL is returned in that case.
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[modifica] Note

pow(float, int) torna float fino a C + +11 (per sovraccarico 5) ma ritorna double dal C + +11 (per sovraccarico 4)
Original:
pow(float, int) returns float until C++11 (per overload 5) but returns double since C++11 (per overload 4)
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[modifica] Vedi anche
ritorna e elevato alla potenza data (ex)
Original:
returns e raised to the given power (ex)
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(funzione) [modifica]
calcola naturale (base e) logaritmo (alla base e) (ln(x))
Original:
computes natural (base e) logarithm (to base e) (ln(x))
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(funzione) [modifica]
calcola la radice quadrata (√x)
Original:
computes square root (√x)
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(funzione) [modifica]
(C++11)
calcola radice cubica (3√x)
Original:
computes cubic root (3√x)
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(funzione) [modifica]
potenza complessa, uno o entrambi gli argomenti può essere un numero complesso
Original:
complex power, one or both arguments may be a complex number
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(funzione di modello) [modifica]
applica la std::pow funzione a due valarrays o un valarray e un valore
Original:
applies the function std::pow to two valarrays or a valarray and a value
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(funzione di modello) [modifica]
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/numeric/math/pow&oldid=26304"