complex c

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



int main()
{
    std::cout<<"Unesite broj elemenata:\n ";
    int n;
    std::cin>>n;

    double z, fi;
    std::complex<double> Z, priprema(1,0), X;

    int i(0);
    const double PI (3.14);
    while (i!=n)
    {
        std::cout<<" Unesite Z" << i + 1 << "\n";
        std::cin>>z;
        std::cout<<"Unesite fi"<< i + 1 << "\n";
        std::cin>>fi;
        fi=fi*180/PI;
        Z=std::polar(z, fi);

        priprema=priprema+std::complex<double> (1,0)/Z;
        i++;

    }
    X=std::complex<double> (1,0)/priprema;
    double fi1;
    fi1=arg(X);
    fi1=fi1*180/PI;

    std::cout<< "Paralelna veza ovih elemenata ima Z = " << sqrt(X.real() * X.real() + X.imag() * X.imag())
    << " i fi = "<< fi1 << std::endl;


    return 0;
}