Eroare de compilare: user.cpp:2:1: error: ‘ifstream’ does not name a type ifstream f("adunare.in"); ^ user.cpp:3:1: error: ‘ofstream’ does not name a type ofstream g("adunare.out"); ^ user.cpp: In function ‘int main()’: user.cpp:9:2: error: ‘f’ was not declared in this scope f>>a>>b; ^ user.cpp:11:2: error: ‘g’ was not declared in this scope g<<s; ^