Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:10: error: variable ‘std::ifstream f’ has initializer but incomplete type user.cpp:11: error: variable ‘std::ofstream g’ has initializer but incomplete type user.cpp:13: error: ‘i’ was not declared in this scope user.cpp:9: warning: unused variable ‘y’ user.cpp:9: warning: unused variable ‘k’ user.cpp:9: warning: unused variable ‘ok’ user.cpp:9: warning: unused variable ‘sum’ user.cpp:9: warning: unused variable ‘nrp’