std::real(std::complex)

Defined in header `<complex>`
template< class T > T real( const complex<T>& z );	(1)	(until C++14)
template< class T > constexpr T real( const complex<T>& z );	(1)	(since C++14)
long double real( long double z );	(2)	(since C++11)
template< class DoubleOrInteger > double real( DoubleOrInteger z );	(3)	(since C++11)
float real( float z );	(4)	(since C++11)

Returns the real component of the complex number z, i.e. z.real().

Additional overloads are provided for float, double, long double, and all integer types, which are treated as complex numbers with zero imaginary component. (since C++11)

[edit] Parameters

z

-

complex value

[edit] Return value

the real component of z

[edit] See also

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

Language
Standard library headers
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)
Technical Specifications

Common mathematical functions
Floating-point environment
Complex numbers
Numeric arrays
Pseudo-random number generation
Compile-time rational arithmetic (C++11)
Generic numeric operations
iota (C++11)
accumulate
inner_product
adjacent_difference
partial_sum