Compilare: user.cpp: In function ‘int main()’: user.cpp:30:5: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i; i<=n; i++) ^ user.cpp:31:14: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int j; j<=n; j++) ^ user.cpp:22:3: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i; i<=n; i++) ^