Eroare de compilare: main.cpp: In function 'int main()': main.cpp:14:4: error: expected initializer before 'ifstream' ifstream in("cifra.in"); ^~~~~~~~ main.cpp:17:4: error: 'in' was not declared in this scope in>>T; ^~ main.cpp:28:16: error: 'i' was not declared in this scope suma=suma+ i*i; ^ main.cpp:31:4: error: 'cifra' was not declared in this scope cifra=suma%10; ^~~~~ main.cpp:33:7: error: no match for 'operator>>' (operand types are 'std::ofstream {aka std::basic_ofstream<char>}' and '<unresolved overloaded function type>') out>>endl; ~~~^~~~~~ In file included from /usr/include/c++/6/string:53:0, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/bits/basic_string.tcc:1437:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) operator>>(basic_istream<_CharT, _Traits>& __in, ^~~~~~~~ /usr/include/c++/6/bits/basic_string.tcc:1437:5: note: template argument deduction/substitution failed: main.cpp:33:9: note: 'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>' out>>endl; ^~~~ In file included from /usr/include/c++/6/istream:934:0, from /usr/include/c++/6/iostream:40, from main.cpp:1: /usr/include/c++/6/bits/istream.tcc:963:5: note: candidate: template<class _CharT2, class _Traits2> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*) operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s) ^~~~~~~~ /usr/include/c++/6/bits/istream.tcc:963:5: note: template argument deduction/substitution failed: main.cpp:33:9: note: 'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>' out>>endl; ^~~~ In file included from /usr/include/c++/6/istream:934:0, from /usr/include/c++/6/iostream:40, from main.cpp:1: /usr/include/c++/6/bits/istream.tcc:931:5: note: candidate: template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&) operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c) ^~~~~~~~ /usr/include/c++/6/bits/istream.tcc:931:5: note: template argument deduction/substitution failed: main.cpp:33:9: note: 'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>' out>>endl; ^~~~ Non zero exit status: 1