foo.cc:1:20: error: expected ';' before 'namespace'
    1 | using namespace std
      |                    ^
      |                    ;
foo.cc: In function 'int main()':
foo.cc:6:11: error: expected ';' before 'enter'
    6 | cout <<"A" enter;
      |           ^~~~~~
      |           ;
foo.cc:7:12: error: expected ';' before 'enter'
    7 | cout <<"AA" enter;
      |            ^~~~~~
      |            ;
foo.cc:8:13: error: expected ';' before 'enter'
    8 | cout <<"AAA" enter;
      |             ^~~~~~
      |             ;

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