Compilare: user.cpp: In function 'void back()': user.cpp:11: warning: array subscript has type 'char' user.cpp: In function 'int main()': user.cpp:36: warning: array subscript has type 'char' user.cpp:49: warning: array subscript has type 'char' user.cpp:62: warning: array subscript has type 'char' user.cpp:75: warning: array subscript has type 'char' user.cpp:88: warning: array subscript has type 'char' user.cpp:101: warning: array subscript has type 'char' user.cpp:114: warning: array subscript has type 'char' user.cpp:127: warning: array subscript has type 'char' user.cpp:140: warning: array subscript has type 'char' user.cpp:153: warning: array subscript has type 'char' user.cpp:166: warning: array subscript has type 'char' user.cpp:179: warning: array subscript has type 'char' user.cpp:192: warning: array subscript has type 'char' user.cpp:205: warning: array subscript has type 'char' user.cpp:218: warning: array subscript has type 'char' user.cpp:231: warning: array subscript has type 'char' user.cpp:244: warning: array subscript has type 'char' user.cpp:257: warning: array subscript has type 'char' user.cpp:270: warning: array subscript has type 'char' user.cpp:283: warning: array subscript has type 'char' user.cpp:296: warning: array subscript has type 'char' user.cpp:309: warning: array subscript has type 'char'