/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++/5/iosfwd:39:0,
                 from /usr/include/c++/5/ios:38,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from /in/foo.cc:1:
/usr/include/c++/5/bits/stringfwd.h:74:33: note:   'std::__cxx11::string'
   typedef basic_string<char>    string;   
                                 ^
/usr/include/c++/5/bits/stringfwd.h:74:33: note:   'std::__cxx11::string'
/in/foo.cc:6:15: error: 'cin' was not declared in this scope
  while(getlin(cin,s))
               ^
/in/foo.cc:6:15: note: suggested alternative:
In file included from /in/foo.cc:1:0:
/usr/include/c++/5/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^
/in/foo.cc:6:19: error: 's' was not declared in this scope
  while(getlin(cin,s))
                   ^
/in/foo.cc:6:20: error: 'getlin' was not declared in this scope
  while(getlin(cin,s))
                    ^
/in/foo.cc:8:7: error: 'cout' was not declared in this scope
       cout<<s<<endl;
       ^
/in/foo.cc:8:7: note: suggested alternative:
In file included from /in/foo.cc:1:0:
/usr/include/c++/5/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^
/in/foo.cc:8:16: error: 'endl' was not declared in this scope
       cout<<s<<endl;
                ^
/in/foo.cc:8:16: note: suggested alternative:
In file included from /usr/include/c++/5/iostream:39:0,
                 from /in/foo.cc:1:
/usr/include/c++/5/ostream:590:5: note:   'std::endl'
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^