/in/foo.cc: In function 'int main()':
/in/foo.cc:7:2: error: 'cin' was not declared in this scope
cin>>a>>k;
^~~
/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:60:18: note: 'std::cin'
extern istream cin; /// Linked to standard input
^~~
/in/foo.cc:8:2: error: 'cout' was not declared in this scope
cout << std::fixed << std::setprecision(k) << a << endl;
^~~~
/in/foo.cc:8:2: 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
^~~~
/in/foo.cc:8:53: error: 'endl' was not declared in this scope
cout << std::fixed << std::setprecision(k) << a << endl;
^~~~
/in/foo.cc:8:53: note: suggested alternative:
In file included from /usr/include/c++/6/istream:39:0,
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/ostream:590:5: note: 'std::endl'
endl(basic_ostream<_CharT, _Traits>& __os)
^~~~