/in/foo.cc: In function 'int main()':
/in/foo.cc:5:9: error: expected initializer before 'cin'
    5 |         cin>>a;
      |         ^~~
/in/foo.cc:6:2: error: 'cout' was not declared in this scope
    6 |  cout>>a>>endl;
      |  ^~~~
/in/foo.cc:2:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    1 | #include <cmath>
  +++ |+#include <iostream>
    2 | using namespace std;
/in/foo.cc:6:8: error: 'a' was not declared in this scope
    6 |  cout>>a>>endl;
      |        ^
/in/foo.cc:6:11: error: 'endl' was not declared in this scope
    6 |  cout>>a>>endl;
      |           ^~~~
/in/foo.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; did you forget to '#include <ostream>'?
    1 | #include <cmath>
  +++ |+#include <ostream>
    2 | using namespace std;
/in/foo.cc:7:10: error: expected ';' at end of input
    7 |  return 0
      |          ^
      |          ;
/in/foo.cc:7:10: error: expected '}' at end of input
/in/foo.cc:4:1: note: to match this '{'
    4 | {int a
      | ^