std::pow – cppreference.com

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definiert in 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)	(seit C++11)

`float pow( float base, int iexp );`	(5)	(bis C + +11)

`double pow( double base, int iexp );`	(6)	(bis C + +11)

`long double pow( long double base, int iexp );`	(7)	(bis C + +11)

Berechnet den Wert von base potenziert exp oder iexp .

Original:

Computes the value of base raised to the power exp or iexp.

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Ein Satz von Überlastungen oder eine Funktion Vorlage für alle Kombinationen von Argumenten des arithmetischen Typ mit 1-3 nicht abgedeckt). Wenn ein Argument hat integralen Typ, wird es double gegossen. Ist eines der Argumente long double, dann der Rückgabetyp Promoted ist auch long double, da sonst der Rückgabetyp immer 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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Parameter

base	-	Basis als Fließkommazahl 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	-	Exponent als Fließkommazahl 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	-	Exponenten als Integer-Wert 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.

Rückgabewert

base erhöht durch Macht (exp oder iexp) .

Original:

base raised by power (exp or iexp).

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Domain-Fehler tritt auf, wenn base 0 ist und exp kleiner oder gleich 0. NAN wird in diesem Fall wieder .

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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Domain-Fehler tritt auf, wenn base negativ ist und exp ist kein ganzzahliger Wert ist. NAN wird in diesem Fall wieder .

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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Bereichs-Fehler tritt auf, wenn ein Überlauf stattfindet. HUGEVAL wird in diesem Fall wieder .

Original:

Range error occurs if an overflow takes place. HUGEVAL is returned in that case.

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Notes

pow(float, int) gibt float bis C++11 zurück (per Überladung 5) aber double seit C++11 (per Überladung 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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Siehe auch


exp	Renditen e an die angegebene Leistung (e^x) angehoben 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. (Funktion) [edit]

log	berechnet natürlichen (base e) Logarithmus (zur Basis 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. (Funktion) [edit]

sqrt	berechnet Quadratwurzel (√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. (Funktion) [edit]

cbrt (C++11)	berechnet Kubikwurzel (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. (Funktion) [edit]

pow(std::complex)	komplexe Leistung, eine oder beide Argumente kann eine komplexe Zahl sein 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. (Funktions-Template) [edit]

pow(std::valarray)	wendet die Funktion std::pow zwei valarrays oder valarray und einem Wert 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. (Funktions-Template) [edit]