foo.cc:5:50: warning: missing terminating " character
     cou <<          *********           *********" << endl;
                                                  ^
foo.cc:5:50: error: missing terminating " character
     cou <<          *********           *********" << endl;
                                                  ^~~~~~~~~~
foo.cc:6:54: warning: missing terminating " character
     cout<<      *****************   *****************" << endl;
                                                      ^
foo.cc:6:54: error: missing terminating " character
     cout<<      *****************   *****************" << endl;
                                                      ^~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:5:5: error: 'cou' was not declared in this scope
     cou <<          *********           *********" << endl;
     ^~~
foo.cc:5:5: note: suggested alternative: 'cos'
     cou <<          *********           *********" << endl;
     ^~~
     cos
foo.cc:5:49: error: no match for 'operator*' (operand type is 'std::ostream {aka std::basic_ostream<char>}')
     cou <<          *********           *********" << endl;
                                                 ^~~~~~~~~~~
     cout<<      *****************   *****************" << endl;
     ~~~~                                         
In file included from /usr/include/c++/7/ccomplex:39:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from foo.cc:1:
/usr/include/c++/7/complex:386:5: note: candidate: template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const std::complex<_Tp>&)
     operator*(const complex<_Tp>& __x, const complex<_Tp>& __y)
     ^~~~~~~~
/usr/include/c++/7/complex:386:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::complex<_Tp>'
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/c++/7/ccomplex:39:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from foo.cc:1:
/usr/include/c++/7/complex:395:5: note: candidate: template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const _Tp&)
     operator*(const complex<_Tp>& __x, const _Tp& __y)
     ^~~~~~~~
/usr/include/c++/7/complex:395:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::complex<_Tp>'
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/c++/7/ccomplex:39:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from foo.cc:1:
/usr/include/c++/7/complex:404:5: note: candidate: template<class _Tp> std::complex<_Tp> std::operator*(const _Tp&, const std::complex<_Tp>&)
     operator*(const _Tp& __x, const complex<_Tp>& __y)
     ^~~~~~~~
/usr/include/c++/7/complex:404:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   candidate expects 2 arguments, 1 provided
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom1, class _Dom2> std::_Expr<std::_BinClos<std::__multiplies, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   candidate expects 2 arguments, 1 provided
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   candidate expects 2 arguments, 1 provided
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from foo.cc:1:
/usr/include/c++/7/valarray:1174:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__multiplies, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(*, __multiplies)
 ^
/usr/include/c++/7/valarray:1174:1: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::valarray<_Tp>'
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from foo.cc:1:
/usr/include/c++/7/valarray:1174:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__multiplies, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const _Tp&)
 _DEFINE_BINARY_OPERATOR(*, __multiplies)
 ^
/usr/include/c++/7/valarray:1174:1: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::valarray<_Tp>'
     cout<<      *****************   *****************" << endl;
     ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from foo.cc:1:
/usr/include/c++/7/valarray:1174:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__multiplies, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const _Tp&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(*, __multiplies)
 ^
/usr/include/c++/7/valarray:1174:1: note:   template argument deduction/substitution failed:
foo.cc:6:5: note:   candidate expects 2 arguments, 1 provided
     cout<<      *****************   *****************" << endl;
     ^~~~
foo.cc:6:53: error: no match for 'operator*' (operand type is 'std::ostream {aka std::basic_ostream<char>}')
     cout<<      *****************   *****************" << endl;
                                                     ^~~~~~~~~~~
     cout<<    **************************************** << endl;
     ~~~~                                             
In file included from /usr/include/c++/7/ccomplex:39:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from foo.cc:1:
/usr/include/c++/7/complex:386:5: note: candidate: template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const std::complex<_Tp>&)
     operator*(const complex<_Tp>& __x, const complex<_Tp>& __y)
     ^~~~~~~~
/usr/include/c++/7/complex:386:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::complex<_Tp>'
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/c++/7/ccomplex:39:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from foo.cc:1:
/usr/include/c++/7/complex:395:5: note: candidate: template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const _Tp&)
     operator*(const complex<_Tp>& __x, const _Tp& __y)
     ^~~~~~~~
/usr/include/c++/7/complex:395:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::complex<_Tp>'
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/c++/7/ccomplex:39:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from foo.cc:1:
/usr/include/c++/7/complex:404:5: note: candidate: template<class _Tp> std::complex<_Tp> std::operator*(const _Tp&, const std::complex<_Tp>&)
     operator*(const _Tp& __x, const complex<_Tp>& __y)
     ^~~~~~~~
/usr/include/c++/7/complex:404:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   candidate expects 2 arguments, 1 provided
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom1, class _Dom2> std::_Expr<std::_BinClos<std::__multiplies, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   candidate expects 2 arguments, 1 provided
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/c++/7/valarray:592:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95,
                 from foo.cc:1:
/usr/include/c++/7/bits/valarray_after.h:404:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__multiplies, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
     ^
/usr/include/c++/7/bits/valarray_after.h:404:5: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   candidate expects 2 arguments, 1 provided
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from foo.cc:1:
/usr/include/c++/7/valarray:1174:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__multiplies, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(*, __multiplies)
 ^
/usr/include/c++/7/valarray:1174:1: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::valarray<_Tp>'
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from foo.cc:1:
/usr/include/c++/7/valarray:1174:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__multiplies, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const _Tp&)
 _DEFINE_BINARY_OPERATOR(*, __multiplies)
 ^
/usr/include/c++/7/valarray:1174:1: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   'std::ostream {aka std::basic_ostream<char>}' is not derived from 'const std::valarray<_Tp>'
     cout<<    **************************************** << endl;
     ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from foo.cc:1:
/usr/include/c++/7/valarray:1174:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__multiplies, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const _Tp&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(*, __multiplies)
 ^
/usr/include/c++/7/valarray:1174:1: note:   template argument deduction/substitution failed:
foo.cc:7:5: note:   candidate expects 2 arguments, 1 provided
     cout<<    **************************************** << endl;
     ^~~~
foo.cc:7:56: error: expected primary-expression before '<<' token
     cout<<    **************************************** << endl;
                                                        ^~
foo.cc:8:58: error: expected primary-expression before '<<' token
     cout<<   ******************************************* << endl;
                                                          ^~
foo.cc:9:58: error: expected primary-expression before '<<' token
     cout<<  ******************************************** << endl;
                                                          ^~
foo.cc:10:59: error: expected primary-expression before '<<' token
     cout<<  ********************************************* << endl;
                                                           ^~
foo.cc:11:59: error: expected primary-expression before '<<' token
     cout<<  ********************************************* << endl;
                                                           ^~
foo.cc:12:59: error: expected primary-expression before '<<' token
     cout<<  ********************************************* << endl;
                                                           ^~
foo.cc:13:59: error: expected primary-expression before '<<' token
     cout<<  ********************************************* << endl;
                                                           ^~
foo.cc:14:59: error: expected primary-expression before '<<' token
     cout<<  ********************************************* << endl;
                                                           ^~
foo.cc:15:58: error: expected primary-expression before '<<' token
     cout<<   ******************************************* << endl;
                                                          ^~
foo.cc:16:57: error: expected primary-expression before '<<' token
     cout<<    ***************************************** << endl;
                                                         ^~
foo.cc:17:57: error: expected primary-expression before '<<' token
     cout<<     **************************************** << endl;
                                                         ^~
foo.cc:18:55: error: expected primary-expression before '<<' token
     cout<<      ************************************* << endl;
                                                       ^~
foo.cc:19:54: error: expected primary-expression before '<<' token
     cout<<       *********************************** << endl;
                                                      ^~
foo.cc:20:53: error: expected primary-expression before '<<' token
     cout<<        ********************************* << endl;
                                                     ^~
foo.cc:21:51: error: expected primary-expression before '<<' token
     cout<<          ***************************** << endl;
                                                   ^~
foo.cc:22:49: error: expected primary-expression before '<<' token
     cout<<            ************************* << endl;
                                                 ^~
foo.cc:23:47: error: expected primary-expression before '<<' token
     cout<<              ********************* << endl;
                                               ^~
foo.cc:24:45: error: expected primary-expression before '<<' token
     cout<<                  *************** << endl;
                                             ^~
foo.cc:25:42: error: expected primary-expression before '<<' token
     cout<<                     ********* << endl;
                                          ^~
foo.cc:26:39: error: expected primary-expression before '<<' token
     cout<<                        *** << endl;
                                       ^~
foo.cc:28:1: error: expected ';' before '}' token
 }
 ^

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。