foo.cc:2:3: error: invalid preprocessing directive #includ; did you mean #include?
    2 | # includ <ios tream<
      |   ^~~~~~
      |   include
foo.cc:1:20: error: expected ';' before 'int'
    1 | using namespace std
      |                    ^
      |                    ;
......
    4 | int main()
      | ~~~                 
foo.cc: In function 'int main()':
foo.cc:6:1: error: 'cout' was not declared in this scope
    6 | cout <<"A" enter;
      | ^~~~
foo.cc:1:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
  +++ |+#include <iostream>
    1 | using namespace std

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