Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
155617 lmh 计算平均数 C++ Compile Error 0 MS 0 KB 254 2026-06-08 17:04:56

Tests(0/0):


Code:

#include<bits/stdc++.h> using namespace std; int main (){ int a[5]; double sum=0; for(int i=0;i<5;i++){ cin>>a[i]; sum=sum+[i]; } cout<<sum/5<<endl; for(int i=0;i<5;i++){ if(a[i]>sum/5){ cout<<a[i]<<" "; } } return 0; }


Run Info:

Main.cc: In lambda function:
Main.cc:8:14: error: expected '{' before ';' token
   sum=sum+[i];
              ^
Main.cc: In function 'int main()':
Main.cc:8:10: error: no match for 'operator+' (operand types are 'double' and 'main()::')
   sum=sum+[i];
          ^
In file included from /usr/include/c++/5/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/5/bits/char_traits.h:39,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/stl_iterator.h:334:5: note: candidate: template std::reverse_iterator<_Iterator> std::operator+(typename std::reverse_iterator<_Iterator>::difference_type, const std::reverse_iterator<_Iterator>&)
     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
     ^
/usr/include/c++/5/bits/stl_iterator.h:334:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::reverse_iterator<_Iterator>'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/5/bits/char_traits.h:39,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/stl_iterator.h:1152:5: note: candidate: template std::move_iterator<_Iterator> std::operator+(typename std::move_iterator<_Iterator>::difference_type, const std::move_iterator<_Iterator>&)
     operator+(typename move_iterator<_Iterator>::difference_type __n,
     ^
/usr/include/c++/5/bits/stl_iterator.h:1152:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::move_iterator<_Iterator>'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4783:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4783:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:53:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.tcc:1151:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(const _CharT* __lhs,
     ^
/usr/include/c++/5/bits/basic_string.tcc:1151:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const _CharT*' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:53:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.tcc:1167:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(_CharT, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(_CharT __lhs, const basic_string<_CharT, _Traits, _Alloc>& __rhs)
     ^
/usr/include/c++/5/bits/basic_string.tcc:1167:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4820:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4820:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4836:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, _CharT)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
     ^
/usr/include/c++/5/bits/basic_string.h:4836:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4848:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4848:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4854:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4854:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4860:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4860:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4872:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const _CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(const _CharT* __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4872:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const _CharT*' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4878:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(_CharT, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(_CharT __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4878:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4884:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _CharT*)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4884:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:4890:5: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, _CharT)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:4890:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/ccomplex:38:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/complex:326:5: note: candidate: template 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++/5/complex:326:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::complex<_Tp>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/ccomplex:38:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/complex:335:5: note: candidate: template std::complex<_Tp> std::operator+(const std::complex<_Tp>&, const _Tp&)
     operator+(const complex<_Tp>& __x, const _Tp& __y)
     ^
/usr/include/c++/5/complex:335:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::complex<_Tp>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/ccomplex:38:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/complex:344:5: note: candidate: template std::complex<_Tp> std::operator+(const _Tp&, const std::complex<_Tp>&)
     operator+(const _Tp& __x, const complex<_Tp>& __y)
     ^
/usr/include/c++/5/complex:344:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::complex<_Tp>'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/ccomplex:38:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/complex:445:5: note: candidate: template std::complex<_Tp> std::operator+(const std::complex<_Tp>&)
     operator+(const complex<_Tp>& __x)
     ^
/usr/include/c++/5/complex:445:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::complex<_Tp>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/vector:65:0,
                 from /usr/include/c++/5/bits/random.h:34,
                 from /usr/include/c++/5/random:49,
                 from /usr/include/c++/5/bits/stl_algo.h:66,
                 from /usr/include/c++/5/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:64,
                 from Main.cc:1:
/usr/include/c++/5/bits/stl_bvector.h:297:3: note: candidate: std::_Bit_iterator std::operator+(std::ptrdiff_t, const std::_Bit_iterator&)
   operator+(ptrdiff_t __n, const _Bit_iterator& __x)
   ^
/usr/include/c++/5/bits/stl_bvector.h:297:3: note:   no known conversion for argument 2 from 'main()::' to 'const std::_Bit_iterator&'
/usr/include/c++/5/bits/stl_bvector.h:387:3: note: candidate: std::_Bit_const_iterator std::operator+(std::ptrdiff_t, const std::_Bit_const_iterator&)
   operator+(ptrdiff_t __n, const _Bit_const_iterator& __x)
   ^
/usr/include/c++/5/bits/stl_bvector.h:387:3: note:   no known conversion for argument 2 from 'main()::' to 'const std::_Bit_const_iterator&'
In file included from /usr/include/c++/5/deque:64:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:67,
                 from Main.cc:1:
/usr/include/c++/5/bits/stl_deque.h:372:5: note: candidate: template std::_Deque_iterator<_Tp, _Ref, _Ptr> std::operator+(std::ptrdiff_t, const std::_Deque_iterator<_Tp, _Ref, _Ptr>&)
     operator+(ptrdiff_t __n, const _Deque_iterator<_Tp, _Ref, _Ptr>& __x)
     ^
/usr/include/c++/5/bits/stl_deque.h:372:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::_Deque_iterator<_Tp, _Ref, _Ptr>'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94,
                 from Main.cc:1:
/usr/include/c++/5/bits/valarray_after.h:402:5: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(+, __plus)
     ^
/usr/include/c++/5/bits/valarray_after.h:402:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94,
                 from Main.cc:1:
/usr/include/c++/5/bits/valarray_after.h:402:5: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
     _DEFINE_EXPR_BINARY_OPERATOR(+, __plus)
     ^
/usr/include/c++/5/bits/valarray_after.h:402:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94,
                 from Main.cc:1:
/usr/include/c++/5/bits/valarray_after.h:402:5: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(+, __plus)
     ^
/usr/include/c++/5/bits/valarray_after.h:402:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94,
                 from Main.cc:1:
/usr/include/c++/5/bits/valarray_after.h:402:5: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray&)
     _DEFINE_EXPR_BINARY_OPERATOR(+, __plus)
     ^
/usr/include/c++/5/bits/valarray_after.h:402:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/c++/5/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94,
                 from Main.cc:1:
/usr/include/c++/5/bits/valarray_after.h:402:5: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const std::valarray&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(+, __plus)
     ^
/usr/include/c++/5/bits/valarray_after.h:402:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   sum=sum+[i];
              ^
In file included from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94:0,
                 from Main.cc:1:
/usr/include/c++/5/valarray:1167:1: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(+, __plus)
 ^
/usr/include/c++/5/valarray:1167:1: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::valarray<_Tp>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94:0,
                 from Main.cc:1:
/usr/include/c++/5/valarray:1167:1: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const std::valarray<_Tp>&, const _Tp&)
 _DEFINE_BINARY_OPERATOR(+, __plus)
 ^
/usr/include/c++/5/valarray:1167:1: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   mismatched types 'const std::valarray<_Tp>' and 'double'
   sum=sum+[i];
              ^
In file included from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:94:0,
                 from Main.cc:1:
/usr/include/c++/5/valarray:1167:1: note: candidate: template std::_Expr, typename std::__fun::result_type> std::operator+(const _Tp&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(+, __plus)
 ^
/usr/include/c++/5/valarray:1167:1: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'main()::' is not derived from 'const std::valarray<_Tp>'
   sum=sum+[i];
              ^