Eroare de compilare: user.cpp:3:1: error: ‘ifstream’ does not name a type ifstream fin("fact.in"); ^ user.cpp:4:1: error: ‘ofstream’ does not name a type ofstream fout("fact.out"); ^ user.cpp: In function ‘int main()’: user.cpp:9:2: error: ‘fin’ was not declared in this scope fin >> p; ^ user.cpp:12:3: error: ‘fout’ was not declared in this scope fout << 1; ^ user.cpp:41:3: error: ‘fout’ was not declared in this scope fout << i; ^ user.cpp:43:3: error: ‘fout’ was not declared in this scope fout << -1; ^