Eroare de compilare: user.cpp:6:1: error: ‘ifstream’ does not name a type ifstream fin ("copaci4.in"); ^ user.cpp:7:1: error: ‘ofstream’ does not name a type ofstream fout ("copaci4.out"); ^ user.cpp: In function ‘int main()’: user.cpp:10:3: error: ‘fin’ was not declared in this scope fin >> n; ^ user.cpp:19:3: error: ‘fout’ was not declared in this scope fout << nr; ^