Eroare de compilare in evaluator: user.cpp:2:15: error: math: No such file or directory user.cpp: In function 'int main()': user.cpp:5: error: 'ifstream' was not declared in this scope user.cpp:5: error: expected `;' before 'f' user.cpp:6: error: 'f' was not declared in this scope user.cpp:8: error: 'ofstream' was not declared in this scope user.cpp:8: error: expected `;' before 'g' user.cpp:12: error: 'sqrt' was not declared in this scope user.cpp:14: error: 'g' was not declared in this scope user.cpp:16: error: 'g' was not declared in this scope