std::complex::complex

From cppreference.com
complex( const T& re = T(), const T& im = T() );
(1)
complex( const complex& other );
(2)

Constructs the std::complex object.

1) Constructs the complex number from real and imaginary parts.

2) Copy constructor. Constructs the object with the copy of the contents of other.

[edit] Parameters

re - the real part
im - the imaginary part
other - another complex to use as source

[edit] See also

assigns the contents
(public member function)