Compilare: user.cpp: In function ‘int main()’: user.cpp:49:30: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%I64d\n", cb(x)); ^ user.cpp: In function ‘long long int cb(int)’: user.cpp:27:10: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^