Eroare de compilare: user.cpp:3:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:6:14: error: variable ‘std::ifstream f’ has initializer but incomplete type ifstream f("adunare.in"); ^ user.cpp:7:14: error: variable ‘std::ofstream g’ has initializer but incomplete type ofstream g("adunare.out") ^ user.cpp:8:4: error: expected ‘,’ or ‘;’ before ‘f’ f>>a>>b; ^