std::complex<T>::real

 

C++

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Technical specifications

Symbols index

External libraries

 

Numerics library

Common mathematical functions

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gcd (C++17)

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exclusive_scan (C++17)

transform_inclusive_scan (C++17)

transform_exclusive_scan (C++17)

Bit operations

bit_cast (C++20)

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has_single_bit (C++20)

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rotr (C++20)

countl_zero (C++20)

countl_one (C++20)

countr_zero (C++20)

countr_one (C++20)

popcount (C++20)

endian (C++20)

 

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!= (until C++20) 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
Power functions
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)

 

primary template complex<T>
	(1)
T real() const;			(until C++14)
constexpr T real() const;			(since C++14)
		(2)
void real( T value );				(until C++20)
constexpr void real( T value );				(since C++20)
specialization complex<float>
			(1)
float real() const;					(until C++11)
constexpr float real() const;					(since C++11)
				(2)
void real( float value );						(until C++20)
constexpr void real( float value );						(since C++20)
specialization complex<double>
					(1)
double real() const;							(until C++11)
constexpr double real() const;							(since C++11)
						(2)
void real( double value );								(until C++20)
constexpr void real( double value );								(since C++20)
specialization complex<long double>
							(1)
long double real() const;									(until C++11)
constexpr long double real() const;									(since C++11)
								(2)
void real( long double value );										(until C++20)
constexpr void real( long double value );										(since C++20)

Accesses the real part of the complex number.

1) Returns the real part.

2) Sets the real part to value.

Parameters

value

-

the value to set the real part to

Return value

1) The real part.

2) (none)

Notes

In C++11, overload (1) in complex specializations used to be specified without const qualifier. However, in C++11, a constexpr specifier used in a non-static member function implies const, and thus the behavior is as if const is specified.

See also

real	returns the real component (function template)
imag	accesses the imaginary part of the complex number (public member function)