Compilare: user.cpp: In function 'int main()': user.cpp:21: warning: array subscript has type 'char' user.cpp:31: warning: array subscript has type 'char' user.cpp:43: warning: array subscript has type 'char' user.cpp:46: warning: array subscript has type 'char' user.cpp:51: warning: array subscript has type 'char' /tmp/ccIGJxhb.o: In function `main': user.cpp:(.text+0x56): warning: the `gets' function is dangerous and should not be used.