Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:29: error: ‘b’ was not declared in this scope user.cpp:32: error: ‘ib’ was not declared in this scope user.cpp:33: error: ‘sfb’ was not declared in this scope user.cpp:36: error: ‘ib’ was not declared in this scope user.cpp:36: error: ‘sfb’ was not declared in this scope user.cpp:36: error: ‘b’ was not declared in this scope user.cpp:7: warning: unused variable ‘a’