Compilare: user.cpp: In function 'int main()': user.cpp:45: warning: array subscript has type 'char' user.cpp:49: warning: array subscript has type 'char' user.cpp:50: warning: array subscript has type 'char' user.cpp:52: warning: array subscript has type 'char' user.cpp:54: warning: array subscript has type 'char' user.cpp:61: warning: array subscript has type 'char' user.cpp:64: warning: array subscript has type 'char'