#include
#include
using namespace std;
int main( ) {
double rho = 3.0; // magnitude
double theta = 3.141592 / 2; // angle
complex coord = polar(rho, theta);
cout << "rho = " << abs(coord) << ", theta = " << arg(coord) << endl;
coord += polar(4.0, 0.0);
cout << "rho = " << abs(coord) << ", theta = " << arg(coord) << endl;
}
rho = 3, theta = 1.5708
rho = 5, theta = 0.643501