Compilare: main.cpp: In function 'int main()': main.cpp:30:37: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized] g << ans << ' ' << a << ' ' << b; ^ main.cpp:30:29: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] g << ans << ' ' << a << ' ' << b; ^~~