Compilare: user.cpp: In function 'int can_eval(char)': user.cpp:16: warning: array subscript has type 'char' user.cpp:16: warning: array subscript has type 'char' user.cpp:18: warning: array subscript has type 'char' user.cpp:18: warning: array subscript has type 'char' user.cpp:18: warning: array subscript has type 'char' user.cpp:20: warning: array subscript has type 'char' user.cpp:21: warning: array subscript has type 'char' user.cpp:22: warning: array subscript has type 'char' user.cpp:24: warning: array subscript has type 'char' user.cpp:24: warning: array subscript has type 'char' user.cpp:26: warning: array subscript has type 'char' user.cpp:26: warning: array subscript has type 'char' user.cpp:33: warning: array subscript has type 'char' user.cpp:35: warning: array subscript has type 'char' user.cpp:35: warning: array subscript has type 'char' user.cpp:35: warning: array subscript has type 'char' user.cpp:35: warning: array subscript has type 'char' user.cpp:37: warning: array subscript has type 'char' user.cpp:37: warning: array subscript has type 'char' user.cpp:39: warning: array subscript has type 'char' user.cpp:39: warning: array subscript has type 'char' user.cpp:39: warning: array subscript has type 'char' user.cpp:41: warning: array subscript has type 'char' user.cpp:42: warning: array subscript has type 'char'