Compilare: main.cpp: In function 'void Lg(trie*, char*)': main.cpp:46:13: warning: NULL used in arithmetic [-Wpointer-arith] if(*it==NULL || t->child[ch] == false) ^~~~ main.cpp:46:32: warning: array subscript has type 'char' [-Wchar-subscripts] if(*it==NULL || t->child[ch] == false) ^ main.cpp:51:19: warning: array subscript has type 'char' [-Wchar-subscripts] Lg(t->child[ch], it+1); ^ main.cpp: In function 'int Cnt(trie*, char*)': main.cpp:56:13: warning: NULL used in arithmetic [-Wpointer-arith] if(*it==NULL) ^~~~ main.cpp:58:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(t->child[ch] == false) ^ main.cpp:62:27: warning: array subscript has type 'char' [-Wchar-subscripts] return Cnt(t->child[ch], it+1); ^ main.cpp: In function 'void Del(trie*, char*)': main.cpp:65:13: warning: NULL used in arithmetic [-Wpointer-arith] if(*it==NULL){ ^~~~ main.cpp:71:20: warning: array subscript has type 'char' [-Wchar-subscripts] Del(t->child[ch], it+1); ^ main.cpp:73:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(t->child[ch]->nrchild == 0 && t->child[ch]->nr == 0){ ^ main.cpp:73:49: warning: array subscript has type 'char' [-Wchar-subscripts] if(t->child[ch]->nrchild == 0 && t->child[ch]->nr == 0){ ^ main.cpp:75:27: warning: array subscript has type 'char' [-Wchar-subscripts] delete t->child[ch]; ^ main.cpp:76:20: warning: array subscript has type 'char' [-Wchar-subscripts] t->child[ch]=0; ^ main.cpp: In function 'void Add(trie*, char*)': main.cpp:80:13: warning: NULL used in arithmetic [-Wpointer-arith] if(*it==NULL){ ^~~~ main.cpp:87:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(t->child[ch] == false){ ^ main.cpp:88:20: warning: array subscript has type 'char' [-Wchar-subscripts] t->child[ch]= new trie; ^ main.cpp:92:20: warning: array subscript has type 'char' [-Wchar-subscripts]