Eroare de compilare: main.cpp: In function 'int main()': main.cpp:40:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i = 0; i < s.length(); i++){ | ~~^~~~~~~~~~~~ main.cpp:58:9: error: no match for 'operator<<' (operand types are 'std::ifstream' {aka 'std::basic_ifstream<char>'} and 'int') 58 | fout << nr << endl; | ~~~~ ^~ ~~ | | | | | int | std::ifstream {aka std::basic_ifstream<char>} main.cpp:58:9: note: candidate: 'operator<<(int, int)' (built-in) 58 | fout << nr << endl; | ~~~~~^~~~~ main.cpp:58:9: note: no known conversion for argument 1 from 'std::ifstream' {aka 'std::basic_ifstream<char>'} to 'int' In file included from /usr/include/c++/12.2.1/regex:66, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:110, from main.cpp:2: /usr/include/c++/12.2.1/bits/regex.h:1679:5: 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 sub_match<_Bi_iter>&)' 1679 | operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os, | ^~~~~~~~ /usr/include/c++/12.2.1/bits/regex.h:1679:5: note: template argument deduction/substitution failed: main.cpp:58:12: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 58 | fout << nr << endl; | ^~ In file included from /usr/include/c++/12.2.1/bits/basic_string.h:47, from /usr/include/c++/12.2.1/string:53, from /usr/include/c++/12.2.1/bits/locale_classes.h:40, from /usr/include/c++/12.2.1/bits/ios_base.h:41, from /usr/include/c++/12.2.1/ios:42, from /usr/include/c++/12.2.1/ostream:38, from /usr/include/c++/12.2.1/iostream:39, from main.cpp:1: /usr/include/c++/12.2.1/string_view:672:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, basic_string_view<_CharT, _Traits>)' 672 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/include/c++/12.2.1/string_view:672:5: note: template argument deduction/substitution failed: main.cpp:58:12: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 58 | fout << nr << endl; | ^~ /usr/include/c++/12.2.1/bits/basic_string.h:3883:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)' 3883 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/include/c++/12.2.1/bits/basic_string.h:3883:5: note: template argument deduction/substitution failed: main.cpp:58:12: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 58 | fout << nr << endl; | ^~ In file included from /usr/include/c++/12.2.1/bits/ios_base.h:46: /usr/include/c++/12.2.1/system_error:279:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)' 279 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e) | ^~~~~~~~ Non zero exit status: 1