Judge Information
./test.cpp: In function 'int main()':
./test.cpp:18:17: error: no match for 'operator>>' (operand types are 'std::ostream {aka std::basic_ostream<char>}' and 'const char [2]')
cout>>" ";
^
In file included from /usr/include/c++/5/string:53:0,
from /usr/include/c++/5/bits/locale_classes.h:40,
from /usr/include/c++/5/bits/ios_base.h:41,
from /usr/include/c++/5/ios:42,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iostream:39,
from ./test.cpp:1:
/usr/include/c++/5/bits/basic_string.tcc:1441:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
operator>>(basic_istream<_CharT, _Traits>& __in,
^
/usr/include/c++/5/bits/basic_string.tcc:1441:5: note: template argument deduction/substitution failed:
./test.cpp:18:19: note: 'std::ostream {aka std::basic_ostream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
cout>>" ";
^
In file included from /usr/include/c++/5/istream:934:0,
from /usr/include/c++/5/iostream:40,
from ./test.cpp:1:
/usr/include/c++/5/bits/istream.tcc:955:5: note: candidate: template<class _CharT2, class _Traits2> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
^
/usr/include/c++/5/bits/istream.tcc:955:5: note: template argument deduction/substitution failed:
./test.cpp:18:19: note: 'std::ostream {aka std::basic_ostream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
cout>>" ";
^
In file included from /usr/include/c++/5/istream:934:0,
from /usr/include/c++/5/iostre