Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:9:26: error: no matching function for call to ‘std::basic_iostream<char>::basic_iostream(const char [8])’ iostream in("xspe.in"); ^ user.cpp:9:26: note: candidates are: In file included from /usr/include/c++/4.8/fstream:38:0, from user.cpp:2: /usr/include/c++/4.8/istream:830:7: note: std::basic_iostream<_CharT, _Traits>::basic_iostream() [with _CharT = char; _Traits = std::char_traits<char>] basic_iostream() ^ /usr/include/c++/4.8/istream:830:7: note: candidate expects 0 arguments, 1 provided /usr/include/c++/4.8/istream:820:7: note: std::basic_iostream<_CharT, _Traits>::basic_iostream(std::basic_streambuf<_CharT, _Traits>*) [with _CharT = char; _Traits = std::char_traits<char>] basic_iostream(basic_streambuf<_CharT, _Traits>* __sb) ^ /usr/include/c++/4.8/istream:820:7: note: no known conversion for argument 1 from ‘const char [8]’ to ‘std::basic_streambuf<char>*’ user.cpp:23:30: error: expected ‘]’ before ‘;’ token out>>a[i]+a[nex[a[i]];//printf("%d ",a[i]+a[nex[i]]); ^ user.cpp:23:12: error: no match for ‘operator>>’ (operand types are ‘std::ofstream {aka std::basic_ofstream<char>}’ and ‘int’) out>>a[i]+a[nex[a[i]];//printf("%d ",a[i]+a[nex[i]]); ^ user.cpp:23:12: note: candidates are: In file included from /usr/include/c++/4.8/string:53:0, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:2: /usr/include/c++/4.8/bits/basic_string.tcc:996:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::basic_string<_CharT, _Traits, _Alloc>&) operator>>(basic_istream<_CharT, _Traits>& __in, ^ /usr/include/c++/4.8/bits/basic_string.tcc:996:5: note: template argument deduction/substitution failed: user.cpp:23:30: note: ‘std::ofstream {aka std::basic_ofstream<char>}’ is not derived from ‘std::basic_istream<_CharT, _Traits>’ out>>a[i]+a[nex[a[i]];//printf("%d ",a[i]+a[nex[i]]); ^ In file included from /usr/include/c++/4.8/istream:879:0, from /usr/include/c++/4.8/fstream:38, from user.cpp:2: /usr/include/c++/4.8/bits/istream.tcc:955:5: note: 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++/4.8/bits/istream.tcc:955:5: note: template argument deduction/substitution failed: user.cpp:23:30: note: ‘std::ofstream {aka std::basic_ofstream<char>}’ is not derived from ‘std::basic_istream<_CharT, _Traits>’ out>>a[i]+a[nex[a[i]];//printf("%d ",a[i]+a[nex[i]]); ^ In file included from /usr/include/c++/4.8/istream:879:0, from /usr/include/c++/4.8/fstream:38, from user.cpp:2: /usr/include/c++/4.8/bits/istream.tcc:923:5: note: template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)