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

prog.cpp: In function ‘int main()’:
prog.cpp:7:19: error: no match for ‘operator>>’ in ‘std::cin >> p.std::complex<double>::real()’
prog.cpp:7:19: note: candidates are:
In file included from /usr/include/c++/4.7/iostream:41:0,
                 from prog.cpp:1:
/usr/include/c++/4.7/istream:118:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:118:7: note:   no known conversion for argument 1 from ‘double’ to ‘std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&) {aka std::basic_istream<char>& (*)(std::basic_istream<char>&)}’
/usr/include/c++/4.7/istream:122:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]
/usr/include/c++/4.7/istream:122:7: note:   no known conversion for argument 1 from ‘double’ to ‘std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}’
/usr/include/c++/4.7/istream:129:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:129:7: note:   no known conversion for argument 1 from ‘double’ to ‘std::ios_base& (*)(std::ios_base&)’
/usr/include/c++/4.7/istream:166:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:166:7: note:   no known conversion for argument 1 from ‘double’ to ‘bool&’
/usr/include/c++/4.7/istream:170:7: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]
/usr/include/c++/4.7/istream:170:7: note:   no known conversion for argument 1 from ‘double’ to ‘short int&’
/usr/include/c++/4.7/istream:173:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:173:7: note:   no known conversion for argument 1 from ‘double’ to ‘short unsigned int&’
/usr/include/c++/4.7/istream:177:7: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]
/usr/include/c++/4.7/istream:177:7: note:   no known conversion for argument 1 from ‘double’ to ‘int&’
/usr/include/c++/4.7/istream:180:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:180:7: note:   no known conversion for argument 1 from ‘double’ to ‘unsigned int&’
/usr/include/c++/4.7/istream:184:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:184:7: note:   no known conversion for argument 1 from ‘double’ to ‘long int&’
/usr/include/c++/4.7/istream:188:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:188:7: note:   no known conversion for argument 1 from ‘double’ to ‘long unsigned int&’
/usr/include/c++/4.7/istream:193:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:193:7: note:   no known conversion for argument 1 from ‘double’ to ‘long long int&’
/usr/include/c++/4.7/istream:197:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:197:7: note:   no known conversion for argument 1 from ‘double’ to ‘long long unsigned int&’
/usr/include/c++/4.7/istream:212:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:212:7: note:   no known conversion for argument 1 from ‘double’ to ‘float&’
/usr/include/c++/4.7/istream:216:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:216:7: note:   no known conversion for argument 1 from ‘double’ to ‘double&’
/usr/include/c++/4.7/istream:220:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:220:7: note:   no known conversion for argument 1 from ‘double’ to ‘long double&’
/usr/include/c++/4.7/istream:233:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]
/usr/include/c++/4.7/istream:233:7: note:   no known conversion for argument 1 from ‘double’ to ‘void*&’
/usr/include/c++/4.7/istream:257:7: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>]
/usr/include/c++/4.7/istream:257:7: note:   no known conversion for argument 1 from ‘double’ to ‘std::basic_istream<char>::__streambuf_type* {aka std::basic_streambuf<char>*}’
In file included from /usr/include/c++/4.7/string:55:0,
                 from /usr/include/c++/4.7/bits/locale_classes.h:42,
                 from /usr/include/c++/4.7/bits/ios_base.h:43,
                 from /usr/include/c++/4.7/ios:43,
                 from /usr/include/c++/4.7/ostream:40,
                 from /usr/include/c++/4.7/iostream:40,
                 from prog.cpp:1:
/usr/include/c++/4.7/bits/basic_string.tcc:998:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::basic_string<_CharT, _Traits, _Alloc>&)
/usr/include/c++/4.7/bits/basic_string.tcc:998:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   mismatched types ‘std::basic_string<_CharT, _Traits, _Alloc>’ and ‘double’
In file included from /usr/include/c++/4.7/istream:873:0,
                 from /usr/include/c++/4.7/iostream:41,
                 from prog.cpp:1:
/usr/include/c++/4.7/bits/istream.tcc:957:5: note: template<class _CharT2, class _Traits2> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
/usr/include/c++/4.7/bits/istream.tcc:957:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   mismatched types ‘_CharT2*’ and ‘double’
In file included from /usr/include/c++/4.7/istream:873:0,
                 from /usr/include/c++/4.7/iostream:41,
                 from prog.cpp:1:
/usr/include/c++/4.7/bits/istream.tcc:925:5: note: template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)
/usr/include/c++/4.7/bits/istream.tcc:925:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   deduced conflicting types for parameter ‘_CharT’ (‘char’ and ‘double’)
In file included from /usr/include/c++/4.7/iostream:41:0,
                 from prog.cpp:1:
/usr/include/c++/4.7/istream:725:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char&)
/usr/include/c++/4.7/istream:725:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   cannot convert ‘p.std::complex<double>::real()’ (type ‘double’) to type ‘unsigned char&’
In file included from /usr/include/c++/4.7/iostream:41:0,
                 from prog.cpp:1:
/usr/include/c++/4.7/istream:730:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char&)
/usr/include/c++/4.7/istream:730:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   cannot convert ‘p.std::complex<double>::real()’ (type ‘double’) to type ‘signed char&’
In file included from /usr/include/c++/4.7/iostream:41:0,
                 from prog.cpp:1:
/usr/include/c++/4.7/istream:772:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char*)
/usr/include/c++/4.7/istream:772:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   cannot convert ‘p.std::complex<double>::real()’ (type ‘double’) to type ‘unsigned char*’
In file included from /usr/include/c++/4.7/iostream:41:0,
                 from prog.cpp:1:
/usr/include/c++/4.7/istream:777:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char*)
/usr/include/c++/4.7/istream:777:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   cannot convert ‘p.std::complex<double>::real()’ (type ‘double’) to type ‘signed char*’
In file included from /usr/include/c++/4.7/iostream:41:0,
                 from prog.cpp:1:
/usr/include/c++/4.7/istream:866:5: note: std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = double]
/usr/include/c++/4.7/istream:866:5: note:   no known conversion for argument 2 from ‘double’ to ‘double&’
In file included from prog.cpp:2:0:
/usr/include/c++/4.7/complex:488:5: note: template<class _Tp, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::complex<_Tp>&)
/usr/include/c++/4.7/complex:488:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   mismatched types ‘std::complex<_Tp>’ and ‘double’

Standard output is empty