Eroare de compilare: user.cpp:4:1: error: ‘ifstream’ does not name a type ifstream f("combinari.in"); ^~~~~~~~ user.cpp:5:1: error: ‘ofstream’ does not name a type ofstream g("combinari.out"); ^~~~~~~~ user.cpp: In function ‘void bkt(int, int, int)’: user.cpp:20:25: error: ‘g’ was not declared in this scope g << v[j] << " "; ^ user.cpp:22:19: error: ‘g’ was not declared in this scope g << "\n"; ^ user.cpp: In function ‘int main()’: user.cpp:30:5: error: ‘f’ was not declared in this scope f >> n >> k; ^