Eroare de compilare: user.cpp:9:4: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:5: error: 'f' was not declared in this scope user.cpp:5: error: 'n' was not declared in this scope user.cpp:6: error: 'i' was not declared in this scope user.cpp:8: error: expected `}' at end of input user.cpp:4: warning: unused variable 'x' user.cpp:4: warning: unused variable 'y' user.cpp:8: error: expected `}' at end of input