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>
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| Déclaré dans l'en-tête <complex> |
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(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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Paramètres
| z | - | valeur complexe Original: complex value The text has been machine-translated via Google Translate. |
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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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)
Voir aussi
renvoie l'amplitude d'un nombre complexe Original: returns the magnitude of a complex number The text has been machine-translated via Google Translate. (fonction générique) [edit] | |
retourne la norme au carré Original: returns the squared magnitude The text has been machine-translated via Google Translate. (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 The text has been machine-translated via Google Translate. (fonction générique) [edit] | |