/in/foo.cc: In function 'int main()':
/in/foo.cc:5:12: error: expected primary-expression before '<<' token
     printf(<<"3\n">><<"9---站台\n">><<"4\n">>);
            ^~
/in/foo.cc:5:21: error: expected primary-expression before '<<' token
     printf(<<"3\n">><<"9---站台\n">><<"4\n">>);
                     ^~
/in/foo.cc:5:39: error: expected primary-expression before '<<' token
     printf(<<"3\n">><<"9---站台\n">><<"4\n">>);
                                       ^~
/in/foo.cc:5:48: error: expected primary-expression before ')' token
     printf(<<"3\n">><<"9---站台\n">><<"4\n">>);
                                                ^