Compilare: user.cpp: In function 'char find(char)': user.cpp:53: warning: array subscript has type 'char' user.cpp:53: warning: array subscript has type 'char' user.cpp:55: warning: array subscript has type 'char' user.cpp:57: warning: array subscript has type 'char' user.cpp:58: warning: array subscript has type 'char' user.cpp: In function 'void unite(char, char)': user.cpp:66: warning: array subscript has type 'char' user.cpp:66: warning: array subscript has type 'char' user.cpp:67: warning: array subscript has type 'char' user.cpp:69: warning: array subscript has type 'char' user.cpp:70: warning: array subscript has type 'char' user.cpp:70: warning: array subscript has type 'char' user.cpp:70: warning: array subscript has type 'char'