Compilare: user.cpp: In function ‘void query(Trie*, char*)’: user.cpp:52:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] node = node->son[node->best_son]; ^ user.cpp: In function ‘int main()’: user.cpp:112:19: warning: suggest parentheses around assignment used as truth value [-Wparentheses] bitset = found = pos = 0; ^ user.cpp:94:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fbsearch.out", "w", stdout); ^ user.cpp:96:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &tests); ^ user.cpp:101:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &N, &M); ^ user.cpp:106:19: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] insert(T, line); ^ user.cpp:111:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(line, 50, stdin); ^