std::proj<div class="t-tr-text">(Std :: complex)<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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complex::complex
complex::operator=
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complex::operator+= complex::operator-= complex::operator*= complex::operator/=
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operator== operator!=
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proj (C++11)
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definiert in Header <complex>
template<class T > complex<T> proj(const complex<T>& z );		(seit C++11)

Gibt die Projektion der komplexen Zahl z auf die Riemannsche .

Original:

Returns the projection of the complex number z onto the Riemann sphere.

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Für die meisten z, std::proj(z)==z, aber alle komplexen Unendlichkeiten, selbst wenn die Zahl eine Komponente unendlich ist und das andere ist NaN, positive reelle Unendlichkeit (INFINITY, 0) oder (INFINITY, -0) geworden. Das Vorzeichen der imaginären (Null)-Komponente ist das Zeichen 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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Parameter

z

-

komplexen Wert Original: complex value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

die Projektion des z auf der Riemannschen Kugel

Original:

the projection of z onto the Riemann sphere

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Beispiel

#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';}

Output:

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

Siehe auch

abs(std::complex)	liefert den Betrag einer komplexen Zahl Original: returns the magnitude of 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)
norm	gibt die quadrierte Größe Original: returns the squared magnitude The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template)
polar	konstruiert eine komplexe Zahl von Betrag und Phasenwinkel Original: constructs a complex number from magnitude and phase angle The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template)