Eroare de compilare: user.cpp:5:12: error: variable ‘std::ifstream in’ has initializer but incomplete type ifstream in("prim.in"); ^ user.cpp:6:13: error: variable ‘std::ofstream out’ has initializer but incomplete type ofstream out("prim.out"); ^ user.cpp: In function ‘int main()’: user.cpp:14:12: warning: unused variable ‘n’ [-Wunused-variable] int k, n, z=0; ^ user.cpp:14:15: warning: unused variable ‘z’ [-Wunused-variable] int k, n, z=0; ^