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std::exp<div class="t-tr-text">(スタンダード:: valarrayは)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::valarray)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

提供: cppreference.com
< cpp‎ | numeric‎ | valarray

 
 
 
 
ヘッダ <valarray> で定義
template< class T >
valarray<T> exp( const valarray<T>& va );
va内の要素ごとに計算し eの要素の値に等しい回数だけ累乗.
Original:
For each element in va computes e raised to the power equal to the value of the element.
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目次

[編集] パラメータ

va -
に操作を適用する値の配列
Original:
value array to apply the operation to
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[編集] 値を返します

vaの値によって提起 Eを含む値の配列.
Original:
Value array containing e raised by the values in va.
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[編集] ノート

修飾されていない機能(exp)計算を実行するために使用されます。そのような機能が利用できない場合、std::expは、引数依存の照合のために使用され.
Original:
Unqualified function (exp) is used to perform the computation. If such function is not available, std::exp is used due to argument dependent lookup.
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関数はstd::valarrayから別の戻り値型で実装することができます。この場合、交換型は、次のプロパティがあります
Original:
The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
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[編集] 可能な実装

template< class T >
valarray<T> exp( const valarray<T>& va )
{
    valarray<T> other = va;
    for (T &i : other) {
        i = exp(i);
    }
    return other; // proxy object may be returned
}

[編集]

この例では、オイラーの恒等e
= -1
および関連指数を示しています.
Original:
This example demonstrates the Euler's identity e
= -1
and the related exponents.
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#include <iostream>
#include <complex>
#include <valarray>
 
int main()
{
    const double pi = std::acos(-1);
    std::valarray<std::complex<double>> v = {
        {0, 0}, {0, pi/2}, {0, pi}, {0, 3*pi/2}, {0, 2*pi}
    };
    std::valarray<std::complex<double>> v2 = std::exp(v);
    for(auto n : v2) {
        std::cout << std::fixed << n << '\n';
    }
}

出力:

(1.000000,0.000000)
(0.000000,1.000000)
(-1.000000,0.000000)
(-0.000000,-1.000000)
(1.000000,-0.000000)

[編集] 参照

ex 乗 (ex) を計算します
(関数) [edit]
e を底とする複素指数関数
(関数テンプレート) [edit]