Eroare de compilare: user.cpp:4:1: error: ‘ifstream’ does not name a type ifstream f("fractii.in"); ^ user.cpp:5:1: error: ‘ofstream’ does not name a type ofstream g("fractii.out"); ^ user.cpp: In function ‘int main()’: user.cpp:54:2: error: ‘f’ was not declared in this scope f >> n; ^ user.cpp:56:2: error: ‘g’ was not declared in this scope g << nr; ^