Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
102226 陈海林 [在线测评解答教程] A+B Problem C++ Compile Error 0 MS 0 KB 151 2024-12-21 14:14:39

Tests(0/0):

Code:

#include<iostream> using namespace std; int main() { int a,b; cout<<"a"<<" B"<<endl; cin>>a,b; cout>>"a+b=">>a+b; return 0;

Run Info:

Main.cc: In function 'int main()':
Main.cc:7:13: warning: right operand of comma operator has no effect [-Wunused-value]
     cin>>a,b;
             ^
Main.cc:8:9: error: no match for 'operator>>' (operand types are 'std::ostream {aka std::basic_ostream}' and 'const char [5]')
     cout>>"a+b=">>a+b;
         ^
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/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.tcc:1441:5: note: candidate: template std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator>>(basic_istream<_CharT, _Traits>& __in,
     ^
/usr/include/c++/5/bits/basic_string.tcc:1441:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>"a+b=">>a+b;
           ^
In file included from /usr/include/c++/5/istream:934:0,
                 from /usr/include/c++/5/iostream:40,
                 from Main.cc:1:
/usr/include/c++/5/bits/istream.tcc:955:5: note: candidate: template std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
     ^
/usr/include/c++/5/bits/istream.tcc:955:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>"a+b=">>a+b;
           ^
In file included from /usr/include/c++/5/istream:934:0,
                 from /usr/include/c++/5/iostream:40,
                 from Main.cc:1:
/usr/include/c++/5/bits/istream.tcc:923:5: note: candidate: template std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
     ^
/usr/include/c++/5/bits/istream.tcc:923:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>"a+b=">>a+b;
           ^
In file included from /usr/include/c++/5/iostream:40:0,
                 from Main.cc:1:
/usr/include/c++/5/istream:756:5: note: candidate: template std::basic_istream& std::operator>>(std::basic_istream&, unsigned char&)
     operator>>(basic_istream& __in, unsigned char& __c)
     ^
/usr/include/c++/5/istream:756:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>"a+b=">>a+b;
           ^
In file included from /usr/include/c++/5/iostream:40:0,
                 from Main.cc:1:
/usr/include/c++/5/istream:761:5: note: candidate: template std::basic_istream& std::operator>>(std::basic_istream&, signed char&)
     operator>>(basic_istream& __in, signed char& __c)
     ^
/usr/include/c++/5/istream:761:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>"a+b=">>a+b;
           ^
In file included from /usr/include/c++/5/iostream:40:0,
                 from Main.cc:1:
/usr/include/c++/5/istream:803:5: note: candidate: template std::basic_istream& std::operator>>(std::basic_istream&, unsigned char*)
     operator>>(basic_istream& __in, unsigned char* __s)
     ^
/usr/include/c++/5/istream:803:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>"a+b=">>a+b;
           ^
In file included from /usr/include/c++/5/iostream:40:0,
                 from Main.cc:1:
/usr/include/c++/5/istream:808:5: note: candidate: template std::basic_istream& std::operator>>(std::basic_istream&, signed char*)
     operator>>(basic_istream& __in, signed char* __s)
     ^
/usr/include/c++/5/istream:808:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>"a+b=">>a+b;
           ^
In file included from /usr/include/c++/5/iostream:40:0,
                 from Main.cc:1:
/usr/include/c++/5/istream:924:5: note: candidate: template std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&)
     operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x)
     ^
/usr/include/c++/5/istream:924:5: note:   template argument deduction/substitution failed:
Main.cc:8:11: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>"a+b=">>a+b;
           ^
Main.cc:9:13: error: expected '}' at end of input
     return 0;
             ^