运行 ID: 73173

Main.cc: In function ‘int main()’:
Main.cc:18:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
          if(j=h){
             ~^~
Main.cc:19:57: error: no match for ‘operator>>’ (operand types are ‘std::basic_ostream’ and ‘char’)
              cout<>' '<>(int, int) 
Main.cc:19:57: note:   no known conversion for argument 1 from ‘std::basic_ostream’ to ‘int’
In file included from /usr/include/c++/7/string:53:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from Main.cc:1:
/usr/include/c++/7/bits/basic_string.tcc:1465:5: 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++/7/bits/basic_string.tcc:1465:5: note:   template argument deduction/substitution failed:
Main.cc:19:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
              cout<>' '< std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
     ^~~~~~~~
/usr/include/c++/7/bits/istream.tcc:963:5: note:   template argument deduction/substitution failed:
Main.cc:19:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
              cout<>' '< std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
     ^~~~~~~~
/usr/include/c++/7/bits/istream.tcc:931:5: note:   template argument deduction/substitution failed:
Main.cc:19:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, unsigned char&)
     operator>>(basic_istream& __in, unsigned char& __c)
     ^~~~~~~~
/usr/include/c++/7/istream:756:5: note:   template argument deduction/substitution failed:
Main.cc:19:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, signed char&)
     operator>>(basic_istream& __in, signed char& __c)
     ^~~~~~~~
/usr/include/c++/7/istream:761:5: note:   template argument deduction/substitution failed:
Main.cc:19:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, unsigned char*)
     operator>>(basic_istream& __in, unsigned char* __s)
     ^~~~~~~~
/usr/include/c++/7/istream:803:5: note:   template argument deduction/substitution failed:
Main.cc:19:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, signed char*)
     operator>>(basic_istream& __in, signed char* __s)
     ^~~~~~~~
/usr/include/c++/7/istream:808:5: note:   template argument deduction/substitution failed:
Main.cc:19:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< typename std::enable_if >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&)
     operator>>(_Istream&& __is, _Tp&& __x)
     ^~~~~~~~
/usr/include/c++/7/istream:980:5: note:   template argument deduction/substitution failed:
/usr/include/c++/7/istream: In substitution of ‘template typename std::enable_if >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream&; _Tp = char]’:
Main.cc:19:59:   required from here
/usr/include/c++/7/istream:980:5: error: no type named ‘type’ in ‘struct std::enable_if’
Main.cc:20:20: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
          }else if(j=g){
                   ~^~
Main.cc:21:57: error: no match for ‘operator>>’ (operand types are ‘std::basic_ostream’ and ‘char’)
              cout<>' '<>(int, int) 
Main.cc:21:57: note:   no known conversion for argument 1 from ‘std::basic_ostream’ to ‘int’
In file included from /usr/include/c++/7/string:53:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from Main.cc:1:
/usr/include/c++/7/bits/basic_string.tcc:1465:5: 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++/7/bits/basic_string.tcc:1465:5: note:   template argument deduction/substitution failed:
Main.cc:21:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
              cout<>' '< std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
     ^~~~~~~~
/usr/include/c++/7/bits/istream.tcc:963:5: note:   template argument deduction/substitution failed:
Main.cc:21:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
              cout<>' '< std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
     ^~~~~~~~
/usr/include/c++/7/bits/istream.tcc:931:5: note:   template argument deduction/substitution failed:
Main.cc:21:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, unsigned char&)
     operator>>(basic_istream& __in, unsigned char& __c)
     ^~~~~~~~
/usr/include/c++/7/istream:756:5: note:   template argument deduction/substitution failed:
Main.cc:21:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, signed char&)
     operator>>(basic_istream& __in, signed char& __c)
     ^~~~~~~~
/usr/include/c++/7/istream:761:5: note:   template argument deduction/substitution failed:
Main.cc:21:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, unsigned char*)
     operator>>(basic_istream& __in, unsigned char* __s)
     ^~~~~~~~
/usr/include/c++/7/istream:803:5: note:   template argument deduction/substitution failed:
Main.cc:21:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, signed char*)
     operator>>(basic_istream& __in, signed char* __s)
     ^~~~~~~~
/usr/include/c++/7/istream:808:5: note:   template argument deduction/substitution failed:
Main.cc:21:59: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
              cout<>' '< typename std::enable_if >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&)
     operator>>(_Istream&& __is, _Tp&& __x)
     ^~~~~~~~
/usr/include/c++/7/istream:980:5: note:   template argument deduction/substitution failed:
/usr/include/c++/7/istream: In substitution of ‘template typename std::enable_if >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream&; _Tp = char]’:
Main.cc:21:59:   required from here
/usr/include/c++/7/istream:980:5: error: no type named ‘type’ in ‘struct std::enable_if’
Main.cc:23:61: error: no match for ‘operator>>’ (operand types are ‘std::basic_ostream’ and ‘char’)
                  cout<>' '<>(int, int) 
Main.cc:23:61: note:   no known conversion for argument 1 from ‘std::basic_ostream’ to ‘int’
In file included from /usr/include/c++/7/string:53:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from Main.cc:1:
/usr/include/c++/7/bits/basic_string.tcc:1465:5: 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++/7/bits/basic_string.tcc:1465:5: note:   template argument deduction/substitution failed:
Main.cc:23:63: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
                  cout<>' '< std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
     ^~~~~~~~
/usr/include/c++/7/bits/istream.tcc:963:5: note:   template argument deduction/substitution failed:
Main.cc:23:63: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
                  cout<>' '< std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
     ^~~~~~~~
/usr/include/c++/7/bits/istream.tcc:931:5: note:   template argument deduction/substitution failed:
Main.cc:23:63: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
                  cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, unsigned char&)
     operator>>(basic_istream& __in, unsigned char& __c)
     ^~~~~~~~
/usr/include/c++/7/istream:756:5: note:   template argument deduction/substitution failed:
Main.cc:23:63: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
                  cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, signed char&)
     operator>>(basic_istream& __in, signed char& __c)
     ^~~~~~~~
/usr/include/c++/7/istream:761:5: note:   template argument deduction/substitution failed:
Main.cc:23:63: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
                  cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, unsigned char*)
     operator>>(basic_istream& __in, unsigned char* __s)
     ^~~~~~~~
/usr/include/c++/7/istream:803:5: note:   template argument deduction/substitution failed:
Main.cc:23:63: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
                  cout<>' '< std::basic_istream& std::operator>>(std::basic_istream&, signed char*)
     operator>>(basic_istream& __in, signed char* __s)
     ^~~~~~~~
/usr/include/c++/7/istream:808:5: note:   template argument deduction/substitution failed:
Main.cc:23:63: note:   ‘std::basic_ostream’ is not derived from ‘std::basic_istream’
                  cout<>' '< typename std::enable_if >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&)
     operator>>(_Istream&& __is, _Tp&& __x)
     ^~~~~~~~
/usr/include/c++/7/istream:980:5: note:   template argument deduction/substitution failed:
/usr/include/c++/7/istream: In substitution of ‘template typename std::enable_if >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream&; _Tp = char]’:
Main.cc:23:63:   required from here
/usr/include/c++/7/istream:980:5: error: no type named ‘type’ in ‘struct std::enable_if’