Compilare: user.cpp: In function ‘void insert(Trie*, char*)’: user.cpp:27:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(nod->fiu[*p]==NULL) ^ user.cpp:29:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] nod->fiu[*p]=new Trie; ^ user.cpp:32:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] insert(nod->fiu[*p],p+1); ^ user.cpp: In function ‘int erase(Trie*, char*)’: user.cpp:39:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(nod->fiu[*p]){ ^ user.cpp:40:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(erase(nod->fiu[*p],p+1)){ ^ user.cpp:41:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] nod->fiu[*p]=NULL; ^ user.cpp: In function ‘int find(Trie*, char*)’: user.cpp:54:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(nod->fiu[*p]) ^ user.cpp:55:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] return find(nod->fiu[*p],p+1); ^ user.cpp: In function ‘int prefix(Trie*, char*)’: user.cpp:61:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(nod->fiu[*p]) ^ user.cpp:62:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] return prefix(nod->fiu[*p],p+1); ^