Compilare: main.cpp: In function 'int main()': main.cpp:82:37: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized] out << mn2 << "\n" << a << " " << b; ^ main.cpp:82:29: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] out << mn2 << "\n" << a << " " << b; ^~~