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:8:5: error: ‘fin’ was not declared in this scope { fin>>a; ^ user.cpp:10:5: error: ‘fout’ was not declared in this scope fout<<(a+b); ^