Eroare de compilare: user.cpp:13:12: warning: character constant too long for its type user.cpp:15:12: warning: character constant too long for its type user.cpp: In function ‘int main()’: user.cpp:13: error: invalid conversion from ‘int’ to ‘const char*’ user.cpp:13: error: initializing argument 1 of ‘void std::basic_ifstream<_CharT, _Traits>::open(const char*, std::_Ios_Openmode) [with _CharT = char, _Traits = std::char_traits<char>]’ user.cpp:15: error: ‘struct std::ofstream’ has no member named ‘opne’