Eroare de compilare: user.cpp: In function ‘long int evaluare()’: user.cpp:6: error: ‘produs’ was not declared in this scope user.cpp:12: error: ‘f’ was not declared in this scope user.cpp:17: error: ‘f’ was not declared in this scope user.cpp: In function ‘long int produs()’: user.cpp:25: error: ‘numar’ was not declared in this scope user.cpp:31: error: ‘f’ was not declared in this scope user.cpp:36: error: ‘f’ was not declared in this scope user.cpp: In function ‘long int numar()’: user.cpp:47: error: ‘f’ was not declared in this scope user.cpp:52: error: ‘f’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:62: error: ‘ifstream’ was not declared in this scope user.cpp:62: error: expected ‘;’ before ‘f’ user.cpp:63: error: ‘ofstream’ was not declared in this scope user.cpp:63: error: expected ‘;’ before ‘g’ user.cpp:65: error: ‘f’ was not declared in this scope user.cpp:66: error: ‘g’ was not declared in this scope