#include <iostream>
#include <complex>
#include <cmath>

using namespace std;

int main()
{
    

    complex<double> z(3.14, 2.71);

    cout << z <<" " << log(z) << " " <<abs(z) << endl;

// il y a aussi exp arg conj cos cosh sin sinh sqrt ...
 
    cout << z.real() <<" "<<z.imag() << endl;
    

    return (0);
}