Using cin for input complex number in C++11 -

#include <iostream> #include <complex> using namespace std;  int main(){     complex<double> p;     cin >> p.real() >> p.imag(); } 

in g++4.7.2 works successfully, in c++11 failed compile. why?

it gives me following error message:

prog.cpp: in function ‘int main()’: prog.cpp:7:19: error: no match ‘operator>>’ in ‘std::cin >> p.std::complex<double>::real()’ 

full version: http://ideone.com/m3bhvr

you can simpler this:

cin >> p; 

format must be: (real,imag) (see: here)

or can following:

double real, imag; cin >> real >> imag; complex<double> p(real, imag);