Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:20: error: ‘ifstream’ was not declared in this scope user.cpp:20: error: expected ‘;’ before ‘fin’ user.cpp:21: error: ‘ofstream’ was not declared in this scope user.cpp:21: error: expected ‘;’ before ‘fout’ user.cpp:23: error: ‘fin’ was not declared in this scope user.cpp:37: error: ‘fout’ was not declared in this scope user.cpp:42: error: ‘fout’ was not declared in this scope