Compilare: user.cpp: In function 'int main()': user.cpp:26: warning: array subscript has type 'char' user.cpp:27: warning: array subscript has type 'char' user.cpp:28: warning: array subscript has type 'char' user.cpp:29: warning: array subscript has type 'char' user.cpp:46: warning: array subscript has type 'char' user.cpp:47: warning: array subscript has type 'char' user.cpp:51: warning: array subscript has type 'char' user.cpp:52: warning: array subscript has type 'char'