Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:16: error: ‘ifstream’ was not declared in this scope user.cpp:16: error: expected ‘;’ before ‘fin’ user.cpp:17: error: ‘ofstream’ was not declared in this scope user.cpp:17: error: expected ‘;’ before ‘fout’ user.cpp:19: error: ‘fin’ was not declared in this scope user.cpp:28: error: ‘fout’ was not declared in this scope user.cpp:29: error: ‘fout’ was not declared in this scope