Compilare: user.cpp: In function ‘info* go(info*, char)’: user.cpp:110:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->next[ch]) return node->next[ch] = node->next[ch]; ^ user.cpp:110:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->next[ch]) return node->next[ch] = node->next[ch]; ^ user.cpp:110:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->next[ch]) return node->next[ch] = node->next[ch]; ^ user.cpp:111:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!node->fth) return node->next[ch] = node; ^ user.cpp:113:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] return node->next[ch] = go(getLink(node), ch); ^ user.cpp: In function ‘int main()’: user.cpp:71:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.in", "r", stdin); ^ user.cpp:72:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.out", "w", stdout); ^ user.cpp:79:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s %d", a, &n); ^ user.cpp:82:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %s", s); ^