/in/foo.cc: In function 'int main()':
/in/foo.cc:5:2: error: 'string' was not declared in this scope
string s;
^~~~~~
/in/foo.cc:5:2: note: suggested alternatives:
In file included from /usr/include/c++/6/iosfwd:39:0,
from /usr/include/c++/6/ios:38,
from /usr/include/c++/6/istream:38,
from /usr/include/c++/6/sstream:38,
from /usr/include/c++/6/complex:45,
from /usr/include/c++/6/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
from /in/foo.cc:1:
/usr/include/c++/6/bits/stringfwd.h:74:33: note: 'std::__cxx11::string'
typedef basic_string<char> string;
^~~~~~
/usr/include/c++/6/bits/stringfwd.h:74:33: note: 'std::__cxx11::string'
/in/foo.cc:6:5: error: 'cin' was not declared in this scope
cin>>s;
^~~
/in/foo.cc:6:5: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:75:0,
from /in/foo.cc:1:
/usr/include/c++/6/iostream:60:18: note: 'std::cin'
extern istream cin; /// Linked to standard input
^~~
/in/foo.cc:6:10: error: 's' was not declared in this scope
cin>>s;
^
/in/foo.cc:7:2: error: 'cout' was not declared in this scope
cout<<s;
^~~~
/in/foo.cc:7:2: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:75:0,
from /in/foo.cc:1:
/usr/include/c++/6/iostream:61:18: note: 'std::cout'
extern ostream cout; /// Linked to standard output
^~~~