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13633 |
Lê Trọng Tính |
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C/C++ |
Lỗi biên dịch (CE) |
0 MS
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476 |
2022-12-29 19:46:55 |
Lỗi biên dịch:
Main.cc: In function ‘int main()’:
Main.cc:7:9: error: no match for ‘operator<<’ (operand types are ‘std::istream {aka std::basic_istream}’ and ‘int’)
cin <
Main.cc:7:9: note: no known conversion for argument 1 from ‘std::istream {aka std::basic_istream}’ to ‘int’
In file included from /usr/include/c++/7/string:52:0,
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:2:
/usr/include/c++/7/bits/basic_string.h:6284:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
operator<<(basic_ostream<_CharT, _Traits>& __os,
^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6284:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin < std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)
operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
^~~~~~~~
/usr/include/c++/7/system_error:217:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin < std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
^~~~~~~~
/usr/include/c++/7/ostream:497:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin < std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
^~~~~~~~
/usr/include/c++/7/ostream:502:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin < std::basic_ostream& std::operator<<(std::basic_ostream&, char)
operator<<(basic_ostream& __out, char __c)
^~~~~~~~
/usr/include/c++/7/ostream:508:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin < std::basic_ostream& std::operator<<(std::basic_ostream&, signed char)
operator<<(basic_ostream& __out, signed char __c)
^~~~~~~~
/usr/include/c++/7/ostream:514:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin < std::basic_ostream& std::operator<<(std::basic_ostream&, unsigned char)
operator<<(basic_ostream& __out, unsigned char __c)
^~~~~~~~
/usr/include/c++/7/ostream:519:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin < std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
^~~~~~~~
/usr/include/c++/7/ostream:539:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin < std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
^~~~~~~~
/usr/include/c++/7/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin < std::basic_ostream& std::operator<<(std::basic_ostream&, const char*)
operator<<(basic_ostream& __out, const char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:556:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin < std::basic_ostream& std::operator<<(std::basic_ostream&, const signed char*)
operator<<(basic_ostream& __out, const signed char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:569:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin < std::basic_ostream& std::operator<<(std::basic_ostream&, const unsigned char*)
operator<<(basic_ostream& __out, const unsigned char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:574:5: note: template argument deduction/substitution failed:
Main.cc:7:11: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin < typename std::enable_if >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&)
operator<<(_Ostream&& __os, const _Tp& __x)
^~~~~~~~
/usr/include/c++/7/ostream:682:5: note: template argument deduction/substitution failed:
/usr/include/c++/7/ostream: In substitution of ‘template typename std::enable_if >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable::__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&; _Tp = int]’:
Main.cc:7:11: required from here
/usr/include/c++/7/ostream:682:5: error: no type named ‘type’ in ‘struct std::enable_if’
Main.cc:10:13: error: no match for ‘operator<<’ (operand types are ‘std::istream {aka std::basic_istream}’ and ‘int’)
cin << l;
~~~~^~~~
Main.cc:10:13: note: candidate: operator<<(int, int)
Main.cc:10:13: note: no known conversion for argument 1 from ‘std::istream {aka std::basic_istream}’ to ‘int’
In file included from /usr/include/c++/7/string:52:0,
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:2:
/usr/include/c++/7/bits/basic_string.h:6284:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
operator<<(basic_ostream<_CharT, _Traits>& __os,
^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6284:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << l;
^
In file included from /usr/include/c++/7/bits/ios_base.h:46:0,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/ostream:38,
from /usr/include/c++/7/iostream:39,
from Main.cc:2:
/usr/include/c++/7/system_error:217:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)
operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
^~~~~~~~
/usr/include/c++/7/system_error:217:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:497:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
^~~~~~~~
/usr/include/c++/7/ostream:497:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:502:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
^~~~~~~~
/usr/include/c++/7/ostream:502:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:508:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, char)
operator<<(basic_ostream& __out, char __c)
^~~~~~~~
/usr/include/c++/7/ostream:508:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:514:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, signed char)
operator<<(basic_ostream& __out, signed char __c)
^~~~~~~~
/usr/include/c++/7/ostream:514:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:519:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, unsigned char)
operator<<(basic_ostream& __out, unsigned char __c)
^~~~~~~~
/usr/include/c++/7/ostream:519:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:539:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
^~~~~~~~
/usr/include/c++/7/ostream:539:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << l;
^
In file included from /usr/include/c++/7/ostream:693:0,
from /usr/include/c++/7/iostream:39,
from Main.cc:2:
/usr/include/c++/7/bits/ostream.tcc:321:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
^~~~~~~~
/usr/include/c++/7/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:556:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, const char*)
operator<<(basic_ostream& __out, const char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:556:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:569:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, const signed char*)
operator<<(basic_ostream& __out, const signed char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:569:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:574:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, const unsigned char*)
operator<<(basic_ostream& __out, const unsigned char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:574:5: note: template argument deduction/substitution failed:
Main.cc:10:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << l;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:682:5: note: candidate: template typename std::enable_if >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&)
operator<<(_Ostream&& __os, const _Tp& __x)
^~~~~~~~
/usr/include/c++/7/ostream:682:5: note: template argument deduction/substitution failed:
/usr/include/c++/7/ostream: In substitution of ‘template typename std::enable_if >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable::__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&; _Tp = int]’:
Main.cc:10:16: required from here
/usr/include/c++/7/ostream:682:5: error: no type named ‘type’ in ‘struct std::enable_if’
Main.cc:11:13: error: no match for ‘operator<<’ (operand types are ‘std::istream {aka std::basic_istream}’ and ‘int’)
cin << r;
~~~~^~~~
Main.cc:11:13: note: candidate: operator<<(int, int)
Main.cc:11:13: note: no known conversion for argument 1 from ‘std::istream {aka std::basic_istream}’ to ‘int’
In file included from /usr/include/c++/7/string:52:0,
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:2:
/usr/include/c++/7/bits/basic_string.h:6284:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
operator<<(basic_ostream<_CharT, _Traits>& __os,
^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6284:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << r;
^
In file included from /usr/include/c++/7/bits/ios_base.h:46:0,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/ostream:38,
from /usr/include/c++/7/iostream:39,
from Main.cc:2:
/usr/include/c++/7/system_error:217:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)
operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
^~~~~~~~
/usr/include/c++/7/system_error:217:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:497:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
^~~~~~~~
/usr/include/c++/7/ostream:497:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:502:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
^~~~~~~~
/usr/include/c++/7/ostream:502:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:508:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, char)
operator<<(basic_ostream& __out, char __c)
^~~~~~~~
/usr/include/c++/7/ostream:508:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:514:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, signed char)
operator<<(basic_ostream& __out, signed char __c)
^~~~~~~~
/usr/include/c++/7/ostream:514:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:519:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, unsigned char)
operator<<(basic_ostream& __out, unsigned char __c)
^~~~~~~~
/usr/include/c++/7/ostream:519:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:539:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
^~~~~~~~
/usr/include/c++/7/ostream:539:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << r;
^
In file included from /usr/include/c++/7/ostream:693:0,
from /usr/include/c++/7/iostream:39,
from Main.cc:2:
/usr/include/c++/7/bits/ostream.tcc:321:5: note: candidate: template std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
^~~~~~~~
/usr/include/c++/7/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:556:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, const char*)
operator<<(basic_ostream& __out, const char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:556:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:569:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, const signed char*)
operator<<(basic_ostream& __out, const signed char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:569:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:574:5: note: candidate: template std::basic_ostream& std::operator<<(std::basic_ostream&, const unsigned char*)
operator<<(basic_ostream& __out, const unsigned char* __s)
^~~~~~~~
/usr/include/c++/7/ostream:574:5: note: template argument deduction/substitution failed:
Main.cc:11:16: note: ‘std::istream {aka std::basic_istream}’ is not derived from ‘std::basic_ostream’
cin << r;
^
In file included from /usr/include/c++/7/iostream:39:0,
from Main.cc:2:
/usr/include/c++/7/ostream:682:5: note: candidate: template typename std::enable_if >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&)
operator<<(_Ostream&& __os, const _Tp& __x)
^~~~~~~~
/usr/include/c++/7/ostream:682:5: note: template argument deduction/substitution failed:
/usr/include/c++/7/ostream: In substitution of ‘template typename std::enable_if >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable::__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&; _Tp = int]’:
Main.cc:11:16: required from here
/usr/include/c++/7/ostream:682:5: error: no type named ‘type’ in ‘struct std::enable_if’
Main.cc:15:19: error: expected ‘)’ before ‘mod’
if (j mod 4==0) dem++;
^~~
Main.cc:17:22: error: expected ‘)’ before ‘mod’
if(j mod 7==0) dem++;
^~~
Main.cc:19:26: error: expected ‘)’ before ‘mod’
if(j mod 11==0) dem++;
^~~
Main.cc:21:14: error: no match for ‘operator>>’ (operand types are ‘std::ostream {aka std::basic_ostream}’ and ‘int’)
cout >> dem>>"\n";
~~~~~^~~~~~
Main.cc:21:14: note: candidate: operator>>(int, int)
Main.cc:21:14: note: no known conversion for argument 1 from ‘std::ostream {aka std::basic_ostream}’ to ‘int’
In file included from /usr/include/c++/7/string:53:0,