104361

Run ID	作者	问题	语言	测评结果	Time	Memory	代码长度	提交时间
104361	谭景年	02简单两数相加	C++	Compile Error	0 MS	0 KB	196	2025-01-04 20:27:32
Tests(0/0):

Code:

#include<iostream> //#include<> -> 导入 iostream=> 输入输出 using namespace std; int main(){ int a=1; int b=2; cin>>a; cin>>b; cout>>a+b; return 0; }
Run Info:

Main.cc: In function 'int main()':
Main.cc:10:9: error: no match for 'operator>>' (operand types are 'std::ostream {aka std::basic_ostream}' and 'int')
     cout>>a+b;
         ^
Main.cc:10:9: note: candidate: operator>>(int, int) 
Main.cc:10:9: note:   no known conversion for argument 1 from 'std::ostream {aka std::basic_ostream}' to 'int'
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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream'
     cout>>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:10:13: note:   'std::ostream {aka std::basic_ostream}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     cout>>a+b;
             ^
Main.cc:10:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     cout>>a+b;
            ^