Eroare de compilare: user.cpp:4:1: error: ‘ifstream’ does not name a type ifstream in("adunare.in"); ^ user.cpp:5:1: error: ‘ofstream’ does not name a type ofstream out("adunare.out"); ^ user.cpp: In function ‘int main()’: user.cpp:10:2: error: ‘in’ is not a member of ‘std’ std::in>>a>>b; ^ user.cpp:11:2: error: ‘out’ is not a member of ‘std’ std::out<<a+b; ^ user.cpp:12:1: error: ‘in’ was not declared in this scope in.close(); ^ user.cpp:13:1: error: ‘out’ was not declared in this scope out.close(); ^