Main.cc:3:1: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type]
3 | main(){
| ^~~~
Main.cc: In function ‘int main()’:
Main.cc:5:5: error: no match for ‘operator<<’ (operand types are ‘std::istream’ {aka ‘std::basic_istream<char>’} and ‘int’)
5 | cin<<score;
| ~~~^~~~~~~
| | |
| | int
| std::istream {aka std::basic_istream<char>}
Main.cc:5:5: note: candidate: ‘operator<<(int, int)’ (built-in)
5 | cin<<score;
| ~~~^~~~~~~
Main.cc:5:5: note: no known conversion for argument 1 from ‘std::istream’ {aka ‘std::basic_istream<char>’} to ‘int’
In file included from /usr/include/c++/10/regex:62,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
from Main.cc:1:
/usr/include/c++/10/bits/regex.h:1647:5: note: candidate: ‘template<class _Ch_type, class _Ch_traits, class _Bi_iter> std::basic_ostream<_CharT, _Traits>& std::__cxx11::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::sub_match<_Bi_iter>&)’
1647 | operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
| ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1647:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:45,
from Main.cc:1:
/usr/include/c++/10/cstddef:125:5: note: candidate: ‘template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator<<(std::byte, _IntegerType)’
125 | operator<<(byte __b, _IntegerType __shift) noexcept
| ^~~~~~~~
/usr/include/c++/10/cstddef:125:5: note: template argument deduction/substitution failed:
Main.cc:5:2: note: cannot convert ‘std::cin’ (type ‘std::istream’ {aka ‘std::basic_istream<char>’}) to type ‘std::byte’
5 | cin<<score;
| ^~~
In file included from /usr/include/c++/10/bits/basic_string.h:48,
from /usr/include/c++/10/string:55,
from /usr/include/c++/10/bits/locale_classes.h:40,
from /usr/include/c++/10/bits/ios_base.h:41,
from /usr/include/c++/10/ios:42,
from /usr/include/c++/10/istream:38,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/string_view:619:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::basic_string_view<_CharT, _Traits>)’
619 | operator<<(basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/usr/include/c++/10/string_view:619:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/string:55,
from /usr/include/c++/10/bits/locale_classes.h:40,
from /usr/include/c++/10/bits/ios_base.h:41,
from /usr/include/c++/10/ios:42,
from /usr/include/c++/10/istream:38,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/bits/basic_string.h:6468:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)’
6468 | operator<<(basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/usr/include/c++/10/bits/basic_string.h:6468:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/bits/ios_base.h:46,
from /usr/include/c++/10/ios:42,
from /usr/include/c++/10/istream:38,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/system_error:262:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)’
262 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
| ^~~~~~~~
/usr/include/c++/10/system_error:262:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:506:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)’
506 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
| ^~~~~~~~
/usr/include/c++/10/ostream:506:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:511:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)’
511 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
| ^~~~~~~~
/usr/include/c++/10/ostream:511:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:517:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)’
517 | operator<<(basic_ostream<char, _Traits>& __out, char __c)
| ^~~~~~~~
/usr/include/c++/10/ostream:517:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:523:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)’
523 | operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
| ^~~~~~~~
/usr/include/c++/10/ostream:523:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:528:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)’
528 | operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
| ^~~~~~~~
/usr/include/c++/10/ostream:528:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:589:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)’
589 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
| ^~~~~~~~
/usr/include/c++/10/ostream:589:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/ostream:784,
from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/bits/ostream.tcc:321:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)’
321 | operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
| ^~~~~~~~
/usr/include/c++/10/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:606:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)’
606 | operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
| ^~~~~~~~
/usr/include/c++/10/ostream:606:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:619:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)’
619 | operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
| ^~~~~~~~
/usr/include/c++/10/ostream:619:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:624:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)’
624 | operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
| ^~~~~~~~
/usr/include/c++/10/ostream:624:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/istream:39,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/ostream:773:5: note: candidate: ‘template<class _Ostream, class _Tp> typename std::enable_if<std::__and_<std::__not_<std::is_lvalue_reference<_Tp> >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable<typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&)’
773 | operator<<(_Ostream&& __os, const _Tp& __x)
| ^~~~~~~~
/usr/include/c++/10/ostream:773:5: note: template argument deduction/substitution failed:
/usr/include/c++/10/ostream: In substitution of ‘template<class _Ostream, class _Tp> typename std::enable_if<std::__and_<std::__not_<std::is_lvalue_reference<_Tp> >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable<typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_istream<char>&; _Tp = int]’:
Main.cc:5:7: required from here
/usr/include/c++/10/ostream:773:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’
In file included from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from Main.cc:1:
/usr/include/c++/10/complex:554:5: note: candidate: ‘template<class _Tp, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::complex<_Tp>&)’
554 | operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __x)
| ^~~~~~~~
/usr/include/c++/10/complex:554:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:66,
from Main.cc:1:
/usr/include/c++/10/bitset:1540:5: note: candidate: ‘template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::bitset<_Nb>&)’
1540 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/usr/include/c++/10/bitset:1540:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:79:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Resetiosflags)’
79 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:79:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:109:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setiosflags)’
109 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:109:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:143:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setbase)’
143 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:143:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:178:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setfill<_CharT>)’
178 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:178:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:208:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setprecision)’
208 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:208:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:238:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setw)’
238 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:238:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:311:5: note: candidate: ‘template<class _CharT, class _Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_money<_MoneyT>)’
311 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:311:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:72,
from Main.cc:1:
/usr/include/c++/10/iomanip:363:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_time<_CharT>)’
363 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f)
| ^~~~~~~~
/usr/include/c++/10/iomanip:363:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/memory:84,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:82,
from Main.cc:1:
/usr/include/c++/10/bits/shared_ptr.h:69:5: note: candidate: ‘template<class _Ch, class _Tr, class _Tp, __gnu_cxx::_Lock_policy _Lp> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__shared_ptr<_Tp, _Lp>&)’
69 | operator<<(std::basic_ostream<_Ch, _Tr>& __os,
| ^~~~~~~~
/usr/include/c++/10/bits/shared_ptr.h:69:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/valarray:603,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
from Main.cc:1:
/usr/include/c++/10/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/valarray:603,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
from Main.cc:1:
/usr/include/c++/10/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/valarray:603,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
from Main.cc:1:
/usr/include/c++/10/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/valarray:603,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
from Main.cc:1:
/usr/include/c++/10/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/c++/10/valarray:603,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
from Main.cc:1:
/usr/include/c++/10/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
Main.cc:5:7: note: mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
from Main.cc:1:
/usr/include/c++/10/valarray:1193:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const std::valarray<_Tp>&, const std::valarray<_Tp>&)’
1193 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/valarray:1193:1: note: template argument deduction/substitution failed:
Main.cc:5:7: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::valarray<_Tp>’
5 | cin<<score;
| ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
from Main.cc:1:
/usr/include/c++/10/valarray:1193:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const std::valarray<_Tp>&, const typename std::valarray<_Tp>::value_type&)’
1193 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/valarray:1193:1: note: template argument deduction/substitution failed: