std::exp<div class="t-tr-text">(Std :: valarray)<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>

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[modifier] Paramètres

[modifier] Retourne la valeur

[modifier] Notes

• Toutes les fonctions de membre de const std::valarray sont fournis .

  Original:

  All const member functions of std::valarray are provided.

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• std::valarray, std::slice_array, std::gslice_array, std::mask_array et std::indirect_array peut être construit à partir du type de remplacement .

  Original:

  std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.

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• Toutes les fonctions acceptant un argument de type de const std::valarray& devrait également accepter le type de remplacement .

  Original:

  All functions accepting a arguments of type const std::valarray& should also accept the replacement type.

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• Toutes les fonctions qui acceptent deux arguments de type de const std::valarray& devrait accepter toutes les combinaisons de const std::valarray& et le type de remplacement .

  Original:

  All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.

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[modifier] Mise en œuvre possible

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
}

[modifier] Exemple

#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';
    }
}

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

[modifier] Voir aussi