Compilare: main.cpp: In function 'void trie_insert(trie*, char*)': main.cpp:69:19: warning: array subscript has type 'char' [-Wchar-subscripts] 69 | if (node -> e[*bit] == NULL) | ^~~~ main.cpp:70:19: warning: array subscript has type 'char' [-Wchar-subscripts] 70 | node -> e[*bit] = new trie(); | ^~~~ main.cpp:71:27: warning: array subscript has type 'char' [-Wchar-subscripts] 71 | trie_insert(node -> e[*bit], bit + 1); | ^~~~ main.cpp: In function 'int trie_runthrough(trie*, int, char*)': main.cpp:79:38: warning: array subscript has type 'char' [-Wchar-subscripts] 79 | return trie_runthrough(node -> e[*bit], depth + 1, bit + 1); | ^~~~