include<iostream>

include<complex>

include<memory>

using namespace std;
int main(){
using cplx = complex;

shared_ptr<cplx> p = make_shared<cplx>();
cout << *p << endl;

shared_ptr<cplx> q = make_shared<cplx>(3., 4.);
cout << *q << endl;

shared_ptr<cplx> r = make_shared<cplx>(*q);
cout << *r << endl;

}