(Std :: complexe)<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::complex)</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> - cppreference.com" /> std::proj<div class="t-tr-text">(Std :: complexe)<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::complex)</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> - cppreference.com
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std::proj<div class="t-tr-text">(Std :: complexe)<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::complex)</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>

De cppreference.com
< cpp‎ | numeric‎ | complex

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C++
 
Bibliothèque Numerics
Fonctions mathématiques courantes
Virgule flottante environnement
Nombres complexes
Tableaux numériques
La génération de nombres pseudo-aléatoires
Moment de la compilation arithmétique rationnelle (C++11)
Génériques des opérations numériques
Original:
Generic numeric operations
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iota (C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Nombres complexes
Les fonctions membres
Original:
Member functions
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complex::complex
complex::operator=
complex::real
complex::imag
complex::operator+=
complex::operator-=
complex::operator*=
complex::operator/=
Tiers fonctions
Original:
Non-member functions
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operator==
operator!=
operator<<
operator>>
real
imag
abs
arg
norm
conj
proj (C++11)
polar
Les fonctions exponentielles
Original:
Exponential functions
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exp
log
log10
Les fonctions de puissance
Original:
Power functions
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pow
sqrt
Les fonctions trigonométriques
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Trigonometric functions
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asin (C++11)
acos (C++11)
atan (C++11)
Fonctions hyperboliques
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Hyperbolic functions
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asinh (C++11)
acosh (C++11)
atanh (C++11)
 
Déclaré dans l'en-tête <complex>
template< class T >
complex<T> proj( const complex<T>& z );
 (depuis C++11)
Renvoie la saillie du z nombre complexe sur la sphère de Riemann .
Original:
Returns the projection of the complex number z onto the Riemann sphere.
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Pour la plupart des z, std::proj(z)==z, mais tous les infinis complexes, même les numéros où un composant est infini et l'autre est NaN, deviennent positifs infini réel, (INFINITY, 0) ou (INFINITY, -0). Le signe de l'imaginaire (zéro) composant est le signe de std::imag(z) .
Original:
For most z, std::proj(z)==z, but all complex infinities, even the numbers where one component is infinite and the other is NaN, become positive real infinity, (INFINITY, 0) or (INFINITY, -0). The sign of the imaginary (zero) component is the sign of std::imag(z).
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Sommaire

[modifier] Paramètres

z -
valeur complexe
Original:
complex value
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[modifier] Retourne la valeur

la projection de z sur la sphère de Riemann
Original:
the projection of z onto the Riemann sphere
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[modifier] Exemple

#include <iostream>
#include <complex>
 
int main()
{
    std::complex<double> c1(1, 2);
    std::cout << "proj" << c1 << " = " << std::proj(c1) << '\n';
 
    std::complex<double> c2(INFINITY, -1);
    std::cout << "proj" << c2 << " = " << std::proj(c2) << '\n';
 
    std::complex<double> c3(0, -INFINITY);
    std::cout << "proj" << c3 << " = " << std::proj(c3) << '\n';
}

Résultat : 

proj(1,2) = (1,2)
proj(inf,-1) = (inf,-0)
proj(0,-inf) = (inf,-0)

[modifier] Voir aussi
renvoie l'amplitude d'un nombre complexe
Original:
returns the magnitude of a complex number
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(fonction générique) [edit]
retourne la norme au carré
Original:
returns the squared magnitude
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(fonction générique) [edit]
construit un nombre complexe de magnitude et de l'angle de phase
Original:
constructs a complex number from magnitude and phase angle
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(fonction générique) [edit]
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