Compilare: user.cpp: In function `int main()': user.cpp:7: warning: format argument is not a pointer (arg 3) user.cpp:9: warning: format argument is not a pointer (arg 3) user.cpp:3: warning: `long int n' might be used uninitialized in this function user.cpp:3: warning: `long int t' might be used uninitialized in this function