std::conj(std::complex)
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std::complex
(until C++20)
(C++26)
(C++26)
(C++26)
Defined in header
<complex>
(1)
template< class T >
std::complex <T> conj( const std::complex <T>& z );
(until C++20)
std::complex <T> conj( const std::complex <T>& z );
template< class T >
constexpr std::complex <T> conj( const std::complex <T>& z );
(since C++20)
constexpr std::complex <T> conj( const std::complex <T>& z );
Additional overloads (since C++11)
Defined in header
<complex>
(A)
std::complex <float> conj( float f );
(until C++20)
std::complex <double> conj( double f );
constexpr std::complex <float> conj( float f );
(since C++20) constexpr std::complex <double> conj( double f );
(until C++23)
template< class FloatingPoint >
constexpr std::complex <FloatingPoint> conj( FloatingPoint f );
(since C++23)
constexpr std::complex <FloatingPoint> conj( FloatingPoint f );
(B)
template< class Integer >
constexpr std::complex <double> conj( Integer i );
(until C++20)
constexpr std::complex <double> conj( Integer i );
template< class Integer >
constexpr std::complex <double> conj( Integer i );
(since C++20)
constexpr std::complex <double> conj( Integer i );
A,B) Additional overloads are provided for all integer and floating-point types, which are treated as complex numbers with zero imaginary component.
(since C++11)Contents
[edit] Parameters
z
-
complex value
f
-
floating-point value
i
-
integer value
[edit] Return value
1) The complex conjugate of z.
A) std::complex (f).
B) std::complex <double>(i).
[edit] Notes
The additional overloads are not required to be provided exactly as (A,B). They only need to be sufficient to ensure that for their argument num:
- If num has a standard(until C++23) floating-point type
T, then std::conj(num) has the same effect as std::conj(std::complex <T>(num)). - Otherwise, if num has an integer type, then std::conj(num) has the same effect as std::conj(std::complex <double>(num)).
[edit] Example
Run this code
#include <complex> #include <iostream> int main() { std::complex <double> z(1.0, 2.0); std::cout << "The conjugate of " << z << " is " << std::conj(z) << '\n' << "Their product is " << z * std::conj(z) << '\n'; }
Output:
The conjugate of (1,2) is (1,-2) Their product is (5,0)
[edit] See also
C documentation for conj