/in/foo.cc: In function 'int main()':
/in/foo.cc:4:5: error: 'string' was not declared in this scope
string a,g;
^~~~~~
/in/foo.cc:4:5: 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:10:19: error: 'a' was not declared in this scope
std::cin>>a>>b>>c>>d>>e>>f;
^
/in/foo.cc:21:13: error: 'g' was not declared in this scope
g=a;
^
/in/foo.cc:24:16: error: 'g' was not declared in this scope
std::cout<<g<<'\n'<<result<<'\n'<<sum;
^