Compilare: main.c: In function 'AddTrie': main.c:29:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(!p->poz[c]) { ^ main.c:30:19: warning: array subscript has type 'char' [-Wchar-subscripts] p->poz[c] = 1; ^ main.c:31:20: warning: array subscript has type 'char' [-Wchar-subscripts] p->next[c] = CreateNod(); ^ main.c:34:27: warning: array subscript has type 'char' [-Wchar-subscripts] last = p = p->next[c]; ^ main.c:24:9: warning: unused variable 'lengh' [-Wunused-variable] int lengh = strlen(cuv) - 1; ^~~~~ main.c: In function 'DeleteTrie': main.c:47:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(!p->poz[c]) ^ main.c:54:27: warning: array subscript has type 'char' [-Wchar-subscripts] last = p = p->next[c]; ^ main.c: In function 'PrintFreg': main.c:83:22: warning: array subscript has type 'char' [-Wchar-subscripts] if(!root->poz[c]) ^ main.c:84:13: warning: 'return' with no value, in function returning non-void return; ^~~~~~ main.c:75:5: note: declared here int PrintFreg(Trie* root, char* cuv) { ^~~~~~~~~ main.c:85:33: warning: array subscript has type 'char' [-Wchar-subscripts] last = root = root->next[c]; ^ main.c:78:9: warning: unused variable 'lengh' [-Wunused-variable] int lengh = strlen(cuv) - 1; ^~~~~ main.c: In function 'PrintPref': main.c:98:22: warning: array subscript has type 'char' [-Wchar-subscripts] if(!root->poz[c]) ^ main.c:101:33: warning: array subscript has type 'char' [-Wchar-subscripts] last = root = root->next[c]; ^ main.c:94:11: warning: variable 'last' set but not used [-Wunused-but-set-variable] Trie* last; ^~~~ main.c:93:35: warning: unused variable 'lgt' [-Wunused-variable]