?

/tmp/compiler_jsrjs04q/src: 在函数‘int main()’中: /tmp/compiler_jsrjs04q/src:22:24: 错误：no match for ‘operator<<’ (operand types are ‘std::basic_ostream::__ostream_type’ {aka ‘std::basic_ostream’} and ‘<未解决的重载函数类型>’) 22 | cout<<n<<end; | ~^ In file included from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/istream:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/sstream:38, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/complex:45, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ccomplex:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/x86_64-unknown-linux-gnu/bits/stdc++.h:54, from /tmp/compiler_jsrjs04q/src:1: /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:108:7: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type& ()(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]’ 108 | operator<<(__ostream_type& (__pf)(__ostream_type&)) | ^~~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:108:36: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘std::basic_ostream::__ostream_type& ()(std::basic_ostream::__ostream_type&)’ {aka ‘std::basic_ostream& ()(std::basic_ostream&)’} 108 | operator<<(__ostream_type& (__pf)(__ostream_type&)) | ^~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:117:7: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ios_type& ()(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream; std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios]’ 117 | operator<<(__ios_type& (__pf)(__ios_type&)) | ^~~~~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:117:32: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘std::basic_ostream::__ios_type& ()(std::basic_ostream::__ios_type&)’ {aka ‘std::basic_ios& ()(std::basic_ios&)’} 117 | operator<<(__ios_type& (__pf)(__ios_type&)) | ^~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:127:7: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& ()(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]’ 127 | operator<<(ios_base& (__pf) (ios_base&)) | ^~~~~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:127:30: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘std::ios_base& ()(std::ios_base&)’ 127 | operator<<(ios_base& (__pf) (ios_base&)) | ^~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:166:7: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]’ 166 | operator<<(long __n) | ^~~~~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:166:23: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘long int’ 166 | operator<<(long __n) | ~^ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:170:7: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]’ 170 | operator<<(unsigned long __n) | ^~~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:170:32: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘long unsigned int’ 170 | operator<<(unsigned long __n) | ^ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:174:7: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]’ 174 | operator<<(bool __n) | ^~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:174:23: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘bool’ 174 | operator<<(bool __n) | ~^ In file included from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:826, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/istream:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/sstream:38, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/complex:45, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ccomplex:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/x86_64-unknown-linux-gnu/bits/stdc++.h:54, from /tmp/compiler_jsrjs04q/src:1: /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/bits/ostream.tcc:91:5: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char; _Traits = std::char_traits]’ 91 | basic_ostream<_CharT, _Traits>:: | ^~~~~~~~~~~~~~~~~~~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/bits/ostream.tcc:92:22: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘short int’ 92 | operator<<(short __n) | ^ In file included from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/istream:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/sstream:38, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/complex:45, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ccomplex:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/x86_64-unknown-linux-gnu/bits/stdc++.h:54, from /tmp/compiler_jsrjs04q/src:1: /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:181:7: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]’ 181 | operator<<(unsigned short __n) | ^~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:181:33: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘short unsigned int’ 181 | operator<<(unsigned short __n) | ~^ In file included from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ostream:826, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/istream:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/sstream:38, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/complex:45, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/ccomplex:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/x86_64-unknown-linux-gnu/bits/stdc++.h:54, from /tmp/compiler_jsrjs04q/src:1: /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/bits/ostream.tcc:105:5: 附注：candidate: ‘std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char; _Traits = std::char_traits]’ 105 | basic_ostream<_CharT, _Traits>:: | ^~~~~~~~~~~~~~~~~~ /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/bits/ostream.tcc:106:20: 附注： no known conversion for argument 1 from ‘<未解决的重载函数类型>’ to ‘int’ 106 | operator<<(int __n) | ~~^ In file included from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/istream:39, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/sstream:38, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luogu-gcc-11.2.0/include/c++/11.2.0/complex:45, from /nix/store/fdbr19mgwzmp1f17nbd9pqjv9vl9kzrq-luo ...