std::pow - cppreference.com

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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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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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Parametri

base	-	base come valore in virgola mobile Original: base as floating point value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp	-	esponente come valore in virgola mobile Original: exponent as floating point value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iexp	-	esponente come valore intero Original: exponent as integer value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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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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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Vedi anche


exp	ritorna e elevato alla potenza data (e^x) Original: returns e raised to the given power (e^x) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

log	calcola naturale (base e) logaritmo (alla base e) (ln(x)) Original: computes natural (base e) logarithm (to base e) (ln(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

sqrt	calcola la radice quadrata (√x) Original: computes square root (√x) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

cbrt (C++11)	calcola radice cubica (3√x) Original: computes cubic root (3√x) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

pow(std::complex)	potenza complessa, uno o entrambi gli argomenti può essere un numero complesso Original: complex power, one or both arguments may be a complex number The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello) [modifica]

pow(std::valarray)	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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello) [modifica]