std::conj(std::complex)

template< class T > 
complex<T> conj( const complex<T>& z );

std::complex<long double> conj( long double z );

template< class DoubleOrInteger >
std::complex<double> conj( DoubleOrInteger z );

std::complex<float> conj( float z );

Computes the complex conjugate of z by reversing the sign of the imaginary part.

(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

Return value

The complex conjugate of z.

Example

#include <iostream>
#include <complex>
 
int main()
{
    std::complex<double> z(1,2);
    std::cout << "The conjugate of " << z << " is " << std::conj(z) << '\n'
              << "Their product is " << z*std::conj(z) << '\n';
}

The conjugate of (1,2) is (1,-2)
Their product is (5,0)

See also