Compilare: user.cpp: In function 'int main()': user.cpp:30: warning: array subscript has type 'char' user.cpp:31: warning: array subscript has type 'char' user.cpp:32: warning: array subscript has type 'char' user.cpp:36: warning: array subscript has type 'char' user.cpp:37: warning: array subscript has type 'char' user.cpp:38: warning: array subscript has type 'char' /tmp/ccW7WQ88.o: In function `main': user.cpp:(.text+0x56): warning: the `gets' function is dangerous and should not be used.