std::proj<div class="t-tr-text">(Std :: complesso)<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>

 

C++

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I numeri complessi

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In fase di compilazione aritmetica razionale(C++11)

Generici operazioni numeriche Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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I numeri complessi

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
complex::complex
complex::operator=
complex::real
complex::imag
complex::operator+= complex::operator-= complex::operator*= complex::operator/=
Non membri funzioni Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
operator== operator!=
operator<< operator>>
real
imag
abs
arg
norm
conj
proj (C++11)
polar
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sinh cosh tanh	asinh (C++11) acosh (C++11) atanh (C++11)

 

Elemento definito nell'header <complex>
template<class T > complex<T> proj(const complex<T>& z );		(dal C++11)

Restituisce la proiezione del z numero complesso sulla sfera Riemann.

Original:

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

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Per la maggior parte z, std::proj(z)==z, ma tutti gli infiniti complessi, anche i numeri in cui un componente è infinito e l'altro è NaN, diventare reale positivo infinito, (INFINITY, 0) o (INFINITY, -0). Il segno dell'immaginario (zero) componente è il segno di 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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Parametri

z

-

valore complesso 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.

Valore di ritorno

la proiezione di z sulla sfera di Riemann

Original:

the projection of z onto the Riemann sphere

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Esempio

#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)

Vedi anche

abs(std::complex)	restituisce la grandezza di un numero complesso 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. (funzione di modello)
norm	restituisce la grandezza quadrato 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. (funzione di modello)
polar	costruisce un numero complesso di ampiezza e di fase 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. (funzione di modello)