Compilare: main.cpp: In function 'int main()': main.cpp:81:30: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << a << ' ' << b << '\n'; ^~~~ main.cpp:81:18: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << a << ' ' << b << '\n'; ^~~