Compilare: user.cpp: In function ‘long int factorial(long int)’: user.cpp:7:2: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(long i;i<n;i++) p*=i; ^ user.cpp: In function ‘int main()’: user.cpp:7:2: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:7:11: note: ‘i’ was declared here for(long i;i<n;i++) p*=i; ^