Compilare: user.cpp: In function ‘int main()’: user.cpp:30: warning: array subscript has type ‘char’ user.cpp:33: warning: array subscript has type ‘char’ user.cpp:42: warning: array subscript has type ‘char’ user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp:43: warning: array subscript has type ‘char’ user.cpp:43: warning: array subscript has type ‘char’ user.cpp:47: warning: array subscript has type ‘char’