std::complex::imag
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   T imag() const;  | 
(1) | |
|   void imag( T value );  | 
(2) | |
Accesses the imaginary part of the complex number.
1) Returns the imaginary part.
2) Sets the real imaginary to value.
[edit] Parameters
| value | - | the value to set the imaginary part to | 
[edit] See also
|    accesses the real part of the complex number  (public member function)  | |