Eroare de compilare: user.cpp: In function ‘void alakit(long long unsigned int, char*, int)’: user.cpp:12: warning: unused variable ‘n’ user.cpp: In function ‘int main()’: user.cpp:20: error: ‘fstream’ was not declared in this scope user.cpp:20: error: expected ‘;’ before ‘f’ user.cpp:23: error: ‘f’ was not declared in this scope user.cpp:23: error: ‘ios’ has not been declared user.cpp:36: error: ‘g’ was not declared in this scope user.cpp:36: error: ‘ios’ has not been declared user.cpp:21: warning: unused variable ‘i’