Compilare: user.cpp: In function ‘void add(char*)’: user.cpp:20:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0) ^ user.cpp:21:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] q->fii[s[i]]=new tri; ^ user.cpp:22:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^ user.cpp: In function ‘int cuv(char*)’: user.cpp:30:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0) ^ user.cpp:32:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^ user.cpp: In function ‘int pref(char*)’: user.cpp:38:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0 || (q->fii[s[i]]->pref==0)) ^ user.cpp:38:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0 || (q->fii[s[i]]->pref==0)) ^ user.cpp:40:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^ user.cpp: In function ‘void del(char*)’: user.cpp:48:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^