// Demonstrate complex class
#include <iostream>
#include <complex>
using namespace std;

int main()
{
	complex<double> complex_01(10, 20);
	complex<double> complex_02(40, -3);
	cout << complex_01 <<endl;
	cout << complex_02 << endl;
	complex<double> complex_03 = complex_01 + complex_02;
	cout << complex_03 << endl;
	return 0;
}