Eroare de compilare: user.cpp:3:1: error: ‘ifstream’ does not name a type ifstream fin("adunare.in"); ^ user.cpp:4:1: error: ‘ofstream’ does not name a type ofstream fout("adunare.out"); ^ user.cpp: In function ‘int main()’: user.cpp:8:2: error: ‘fin’ was not declared in this scope fin>>a>>b; ^ user.cpp:9:2: error: ‘fout’ was not declared in this scope fout<<a+b; ^