complex

public member function

complex::complex

complex (const T& re = T(), const T& im = T());
complex (const complex& cmplx);
template<class X>
  complex (const complex<X>& cmplx);

Complex number constructor

Constructs a  complex  object.

It may be constructed from two values ( re  and  im ) or from another complex number.

Parameters

re, im

Real and imaginary parts, respectively, of complex number.
T is  complex's template type.

cmplx

A  complex object.
If constructed from a  complex object with a different template parameter ( X), the apropriate conversions are performed.

Example

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// complex constructor example #include <iostream> #include <complex> using namespace std; int main () { complex<double> first (2.0,2.0); complex<double> second (first); complex<long double> third (second); cout << third; return 0; }

Output:

(2,2)