foo.cc:19:56: warning: multi-character character constant [-Wmultichar]
   19 |                         cout<<".";bb'c'b'c'b'c'bbc'b'cb'cbb'cbbbbbb
      |                                                        ^~~~~~~~~~~~
foo.cc: In function ‘int main()’:
foo.cc:19:35: error: ‘bb’ was not declared in this scope
   19 |                         cout<<".";bb'c'b'c'b'c'bbc'b'cb'cbb'cbbbbbb
      |                                   ^~