Borderou de evaluare (job #767948)

Eroare de compilare: main.cpp: In function 'int centruprim(int)': main.cpp:11:15: warning: variable 'c' set but not used [-Wunused-but-set-variable] 11 | int x=1, c,cn; | ^ main.cpp: In function 'int main()': main.cpp:36:10: error: no match for 'operator<<' (operand types are 'std::ifstream' {aka 'std::basic_ifstream<char>'} and 'int') 36 | f<<0; | ~^~~ | | | | | int | std::ifstream {aka std::basic_ifstream<char>} main.cpp:36:10: note: candidate: 'operator<<(int, int)' (built-in) 36 | f<<0; | ~^~~ main.cpp:36:10: note: no known conversion for argument 1 from 'std::ifstream' {aka 'std::basic_ifstream<char>'} to 'int' In file included from /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/string:54, from /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/bits/locale_classes.h:40, from /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/bits/ios_base.h:41, from /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/ios:44, from /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/ostream:40, from /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/iostream:41, from main.cpp:1: /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/bits/basic_string.h:4032:5: 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, _Alloc>&)' 4032 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/bits/basic_string.h:4032:5: note: template argument deduction/substitution failed: main.cpp:36:12: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 36 | f<<0; | ^ In file included from /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/bits/ios_base.h:46: /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/system_error:339:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)' 339 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e) | ^~~~~~~~ /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/system_error:339:5: note: template argument deduction/substitution failed: main.cpp:36:12: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 36 | f<<0; | ^ /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/ostream:554:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _CharT)' 554 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c) | ^~~~~~~~ /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/ostream:554:5: note: template argument deduction/substitution failed: main.cpp:36:12: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 36 | f<<0; | ^ /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/ostream:564:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, char)' 564 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c) | ^~~~~~~~ /usr/lib/gcc/i686-pc-linux-gnu/13/include/g++-v13/ostream:564:5: note: template argument deduction/substitution failed: main.cpp:36:12: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 36 | f<<0;