Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:64:2: error: ‘ifstream’ was not declared in this scope ifstream f("evaluare.in"); ^ user.cpp:64:2: note: suggested alternative: In file included from /usr/include/c++/4.8/ios:38:0, 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/iosfwd:157:34: note: ‘std::ifstream’ typedef basic_ifstream<char> ifstream; ^ user.cpp:64:11: error: expected ‘;’ before ‘f’ ifstream f("evaluare.in"); ^ user.cpp:65:2: error: ‘ofstream’ was not declared in this scope ofstream g("evaluare.out"); ^ user.cpp:65:2: note: suggested alternative: In file included from /usr/include/c++/4.8/ios:38:0, 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/iosfwd:160:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^ user.cpp:65:11: error: expected ‘;’ before ‘g’ ofstream g("evaluare.out"); ^ user.cpp:67:2: error: ‘f’ was not declared in this scope f.get(s, 100000); ^ user.cpp:68:2: error: ‘g’ was not declared in this scope g << eval_expr(s); ^