Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:41: error: ‘ifstream’ was not declared in this scope user.cpp:41: error: expected ‘;’ before ‘f’ user.cpp:42: error: ‘ofstream’ was not declared in this scope user.cpp:42: error: expected ‘;’ before ‘g’ user.cpp:47: error: ‘f’ was not declared in this scope user.cpp:66: error: ‘g’ was not declared in this scope user.cpp:69: error: ‘g’ was not declared in this scope user.cpp:88: error: ‘g’ was not declared in this scope