std::arg(std::complex)

 

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std::complex

Member functions
complex::complex
complex::operator=
complex::real
complex::imag
complex::operator+=complex::operator-=complex::operator*=complex::operator/=
Non-member functions
operator+operator- operator+operator-operator*operator/ operator==operator!= operator<<operator>>	real imag abs arg norm conj proj (C++11) polar operator""ioperator""ifoperator""il (C++14)(C++14)(C++14)
Exponential functions
exp
log
log10
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pow
sqrt
Trigonometric functions
sin cos tan	asin (C++11) acos (C++11) atan (C++11)
Hyperbolic functions
sinh cosh tanh	asinh (C++11) acosh (C++11) atanh (C++11)

 

Defined in header <complex>
template< class T > T arg( const complex<T>& z );	(1)
long double arg( long double z );	(2)	(since C++11)
template< class DoubleOrIngeter > double arg( DoubleOrInteger z );	(3)	(since C++11)
float arg( float z );	(4)	(since C++11)

Returns the phase angle (in radians) of the complex number z, i.e. atan2(std::imag(z), std::real(z)).

(since C++11)Additional overloads are provided for float, double, long double, and all integer types, which are treated as complex numbers with zero imaginary component.

Parameters

z

-

complex value

Return value

the phase angle of z

See also

abs(std::complex)	returns the magnitude of a complex number (function template)
polar	constructs a complex number from magnitude and phase angle (function template)
atan2	arc tangent, using signs to determine quadrants (function)
atan2(std::valarray)	applies the function std::atan2 to a valarray and a value (function template)
C documentation for carg