Compilare: main.cpp: In function 'void ins(trie*, char*)': main.cpp:19:20: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod->fiu[*it] == 0){ ^ main.cpp:21:19: warning: array subscript has type 'char' [-Wchar-subscripts] nod->fiu[*it] = new trie; ^ main.cpp:23:21: warning: array subscript has type 'char' [-Wchar-subscripts] ins(nod->fiu[*it], it + 1); ^ main.cpp: In function 'void del(trie*, char*)': main.cpp:39:19: warning: array subscript has type 'char' [-Wchar-subscripts] del(nod->fiu[*it], it + 1); ^ main.cpp:41:24: warning: array subscript has type 'char' [-Wchar-subscripts] delete nod->fiu[*it]; ^ main.cpp:43:17: warning: array subscript has type 'char' [-Wchar-subscripts] nod->fiu[*it] = 0; ^ main.cpp: In function 'int get_occ(trie*, char*)': main.cpp:51:20: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod->fiu[*it] == 0) ^ main.cpp:53:32: warning: array subscript has type 'char' [-Wchar-subscripts] return get_occ(nod->fiu[*it], it + 1); ^ main.cpp: In function 'int get_pref(trie*, char*, int)': main.cpp:60:20: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod->fiu[*it] == 0) ^ main.cpp:62:33: warning: array subscript has type 'char' [-Wchar-subscripts] return get_pref(nod->fiu[*it], it + 1, niv + 1); ^