Eroare de compilare: user.cpp:6: error: 'int y1' redeclared as different kind of symbol /usr/include/bits/mathcalls.h:242: error: previous declaration of 'double y1(double)' user.cpp: In function 'int main()': user.cpp:22: error: ambiguous overload for 'operator>>' in '((std::basic_istream<char, std::char_traits<char> >*)((std::basic_istream<char, std::char_traits<char> >*)f.std::basic_ifstream<char, std::char_traits<char> >::<anonymous>.std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(& a))))->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(& b))))->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(& x1))) >> y1' /usr/include/c++/4.2/istream:131: note: candidates are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>& (*)(std::basic_istream<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] <near match> /usr/include/c++/4.2/istream:135: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_ios<_CharT, _Traits>& (*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] <near match> /usr/include/c++/4.2/istream:142: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>] <near match> user.cpp:25: error: pointer to a function used in arithmetic user.cpp:25: error: call of overloaded 'abs(double (*)(double)throw ())' is ambiguous /usr/include/stdlib.h:691: note: candidates are: int abs(int) <near match> /usr/include/c++/4.2/cstdlib:174: note: long long int __gnu_cxx::abs(long long int) <near match> /usr/include/c++/4.2/cstdlib:143: note: long int std::abs(long int) <near match> user.cpp:29: error: ISO C++ forbids comparison between pointer and integer user.cpp:34: error: pointer to a function used in arithmetic user.cpp:34: error: invalid operands of types 'double (*)(double)throw ()' and 'int' to binary 'operator/' user.cpp:45: error: ISO C++ forbids comparison between pointer and integer user.cpp:45: error: ISO C++ forbids comparison between pointer and integer