Eroare de compilare: user.cpp:1:19: error: ifstream: 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 ‘fin’ user.cpp:6: error: ‘ofstream’ was not declared in this scope user.cpp:6: error: expected ‘;’ before ‘fout’ user.cpp:7: error: ‘fin’ was not declared in this scope user.cpp:9: error: ‘o’ was not declared in this scope