Compilare: user.cpp: In function ‘int main()’: user.cpp:8:14: warning: unused variable ‘b’ [-Wunused-variable] int i=0, n, b=0; ^ user.cpp:16:19: warning: ‘n’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (int i=0; i<n-1; i++){ ^