Compilare: main.cpp: In function 'void add(Trie*&, char*)': main.cpp:48:22: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod -> alp[*ch] == NULL) ^ main.cpp:49:38: warning: array subscript has type 'char' [-Wchar-subscripts] ++nod -> let , nod -> alp[*ch] = new Trie; ^ main.cpp:51:23: warning: array subscript has type 'char' [-Wchar-subscripts] add(nod -> alp[*ch] , ch + 1); ^ main.cpp: In function 'bool del(Trie*&, char*)': main.cpp:67:33: warning: array subscript has type 'char' [-Wchar-subscripts] bool ok = del(nod -> alp[*ch] , ch + 1); ^ main.cpp:71:23: warning: array subscript has type 'char' [-Wchar-subscripts] nod -> alp[*ch] = NULL; ^ main.cpp: In function 'void cnt(Trie*, char*)': main.cpp:86:22: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod -> alp[*ch] == NULL) ^ main.cpp:89:23: warning: array subscript has type 'char' [-Wchar-subscripts] cnt(nod -> alp[*ch] , ch + 1); ^ main.cpp: In function 'void pref(Trie*, char*, int)': main.cpp:97:22: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod -> alp[*ch] == NULL) ^ main.cpp:100:24: warning: array subscript has type 'char' [-Wchar-subscripts] pref(nod -> alp[*ch] , ch + 1 , ans + 1); ^