Eroare de compilare: user.cpp:2:1: error: ‘ifstream’ does not name a type ifstream fin ("adunare.in"); ^ user.cpp:3:1: error: ‘ofstream’ does not name a type ofstream fout ("adunare.out"); ^ user.cpp: In function ‘int main()’: user.cpp:7:5: error: ‘fin’ was not declared in this scope fin>>a>>b; ^ user.cpp:8:5: error: ‘fout’ was not declared in this scope fout<<a+b; ^