#include <iostream>
#include <complex>
using std::cout;
using std::endl;
using std::complex;
int main()
{
complex<double> c1(2, 0);
complex<double> c2(4, 4);
cout << c1 << " " << c2 << endl;
complex<double> c3 = c1 + c2;
cout << c3 << endl;
c3 += 199;
cout << c3 << endl;
cout << c2 - c1 << endl;
return 0;
}
/*
run:
(2,0) (4,4)
(6,4)
(205,4)
(2,4)
*/