Eroare de compilare: user.cpp:2:2: error: invalid preprocessing directive #indlude user.cpp: In function ‘int main()’: user.cpp:8: error: variable ‘std::ifstream f’ has initializer but incomplete type user.cpp:9: error: expected ‘,’ or ‘;’ before ‘ofstream’ user.cpp:11: error: ‘a’ was not declared in this scope user.cpp:11: error: ‘b’ was not declared in this scope user.cpp:12: error: ‘s’ was not declared in this scope user.cpp:13: error: ‘g’ was not declared in this scope