/in/foo.cc: In function 'int main()':
/in/foo.cc:3:19: error: 'read' is not a member of 'std'
 return std::cout<<std::read()+std::read();}
                   ^~~
/in/foo.cc:3:31: error: 'read' is not a member of 'std'
 return std::cout<<std::read()+std::read();}
                               ^~~