/in/foo.cc:1:1: error: 'include' does not name a type
 include<iostream>
 ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:5:1: error: 'cin' was not declared in this scope
 cin>>a>>b;
 ^~~
/in/foo.cc:6:1: error: 'cout' was not declared in this scope
 cout<<a+b;
 ^~~~