Eroare de compilare: main.cpp:4:12: error: variable 'std::ifstream in' has initializer but incomplete type ifstream in("cifra.in"); ^ main.cpp:5:14: error: variable 'std::ofstream out' has initializer but incomplete type ofstream out ("cifra.out"); ^ main.cpp: In function 'int main()': main.cpp:29:9: warning: unused variable 'n' [-Wunused-variable] int n,s,t; ^ main.cpp:29:11: warning: unused variable 's' [-Wunused-variable] int n,s,t; ^