Compilare: user.cpp: In function 'int main()': user.cpp:25: warning: array subscript has type 'char' user.cpp:25: warning: array subscript has type 'char' user.cpp:27: 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:28: warning: array subscript has type 'char' user.cpp:29: warning: array subscript has type 'char' user.cpp:29: warning: array subscript has type 'char'