Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
155220 郑雨心 函数求和 C++ Compile Error 0 MS 0 KB 275 2026-06-05 23:01:42

Tests(0/0):

Code:

#include<iostream> using namespace std; int sum (int n,int m) { int sum=0; for (int i=n;i<=m;i++) { sum+=i; } return sum; } int main(){ int c; c=sum(1,10); cout<<c<endl; c=sum(20,30); cout<<c<<endl; c=sum(35,45); cout<<c<<endl; return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:14:9: error: no match for 'operator<' (operand types are 'std::basic_ostream' and '')
  cout< constexpr bool std::operator<(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)
     operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^
/usr/include/c++/5/bits/stl_pair.h:220:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   'std::basic_ostream' is not derived from 'const std::pair<_T1, _T2>'
  cout< bool std::operator<(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator<(const reverse_iterator<_Iterator>& __x,
     ^
/usr/include/c++/5/bits/stl_iterator.h:298:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   'std::basic_ostream' is not derived from 'const std::reverse_iterator<_Iterator>'
  cout< bool std::operator<(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)
     operator<(const reverse_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/5/bits/stl_iterator.h:348:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   'std::basic_ostream' is not derived from 'const std::reverse_iterator<_Iterator>'
  cout< bool std::operator<(const std::move_iterator<_Iterator>&, const std::move_iterator<_IteratorR>&)
     operator<(const move_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/5/bits/stl_iterator.h:1089:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   'std::basic_ostream' is not derived from 'const std::move_iterator<_Iterator>'
  cout< bool std::operator<(const std::move_iterator<_Iterator>&, const std::move_iterator<_Iterator>&)
     operator<(const move_iterator<_Iterator>& __x,
     ^
/usr/include/c++/5/bits/stl_iterator.h:1095:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   'std::basic_ostream' is not derived from 'const std::move_iterator<_Iterator>'
  cout< bool 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:4987:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   'std::basic_ostream' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
  cout< bool 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:4999:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   'std::basic_ostream' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
  cout< bool std::operator<(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator<(const _CharT* __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:5011:5: note:   template argument deduction/substitution failed:
Main.cc:14:10: note:   mismatched types 'const _CharT*' and 'std::basic_ostream'
  cout<' to 'const std::error_code&'
/usr/include/c++/5/system_error:274:3: note: candidate: bool std::operator<(const std::error_condition&, const std::error_condition&)
   operator<(const error_condition& __lhs,
   ^
/usr/include/c++/5/system_error:274:3: note:   no known conversion for argument 1 from 'std::basic_ostream' to 'const std::error_condition&'