[c++] unita' immaginaria

[Andrea Simonassi]

#include <complex>
#include <iostream>

using namespace std;

typedef complex<double> comp;

int main()
{
	const comp i(0,1);
	const comp pi(3.1415926535897932384626433832795);	
	cout << exp (-i*comp(2.0)*pi) << endl;
	return 0;
}