Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
129878 郦辰希 [在线测评解答教程] 求和 C++ Compile Error 0 MS 0 KB 163 2025-09-06 17:15:39

Tests(0/0):

Code:

#include <iostream> using namespace std; int main() { int n,s; while(n!=EOF) { cin<<n; s=n*(n+1)/2; cout<<s; } }

Run Info:

Main.cc: In function 'int main()':
Main.cc:8:12: error: no match for 'operator<<' (operand types are 'std::istream {aka std::basic_istream}' and 'int')
         cin<
Main.cc:8:12: note:   no known conversion for argument 1 from 'std::istream {aka std::basic_istream}' to 'int'
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/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:5172:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator<<(basic_ostream<_CharT, _Traits>& __os,
     ^
/usr/include/c++/5/bits/basic_string.h:5172:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
         cin< std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)
     operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
     ^
/usr/include/c++/5/system_error:209:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
         cin< std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
     ^
/usr/include/c++/5/ostream:497:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
         cin< std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
     ^
/usr/include/c++/5/ostream:502:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
         cin< std::basic_ostream& std::operator<<(std::basic_ostream&, char)
     operator<<(basic_ostream& __out, char __c)
     ^
/usr/include/c++/5/ostream:508:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream'
         cin< std::basic_ostream& std::operator<<(std::basic_ostream&, signed char)
     operator<<(basic_ostream& __out, signed char __c)
     ^
/usr/include/c++/5/ostream:514:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream'
         cin< std::basic_ostream& std::operator<<(std::basic_ostream&, unsigned char)
     operator<<(basic_ostream& __out, unsigned char __c)
     ^
/usr/include/c++/5/ostream:519:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream'
         cin< std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
     ^
/usr/include/c++/5/ostream:539:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
         cin< std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
     ^
/usr/include/c++/5/bits/ostream.tcc:321:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
         cin< std::basic_ostream& std::operator<<(std::basic_ostream&, const char*)
     operator<<(basic_ostream& __out, const char* __s)
     ^
/usr/include/c++/5/ostream:556:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream'
         cin< std::basic_ostream& std::operator<<(std::basic_ostream&, const signed char*)
     operator<<(basic_ostream& __out, const signed char* __s)
     ^
/usr/include/c++/5/ostream:569:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream'
         cin< std::basic_ostream& std::operator<<(std::basic_ostream&, const unsigned char*)
     operator<<(basic_ostream& __out, const unsigned char* __s)
     ^
/usr/include/c++/5/ostream:574:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream'
         cin< std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&)
     operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
     ^
/usr/include/c++/5/ostream:628:5: note:   template argument deduction/substitution failed:
Main.cc:8:14: note:   'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
         cin<