complex::complex


public member function
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)