Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:41:17: error: variable ‘std::ifstream cin’ has initializer but incomplete type ifstream cin("multiplu.in"); ^ user.cpp:42:18: error: variable ‘std::ofstream cout’ has initializer but incomplete type ofstream cout("multiplu.out"); ^ user.cpp:62:17: error: return-statement with no value, in function returning ‘int’ [-fpermissive] return; ^