Compilare: user.cpp: In function 'int fact()': user.cpp:68: warning: array subscript has type 'char' user.cpp: In function 'int main()': user.cpp:88: warning: array subscript has type 'char' user.cpp:88: warning: array subscript has type 'char' user.cpp: In function 'int fact()': user.cpp:52: warning: 'aux' may be used uninitialized in this function /tmp/ccWZX9KK.o: In function `main': user.cpp:(.text+0x2b4): warning: the `gets' function is dangerous and should not be used.