Compilare: user.cpp: In function ‘info* go(info*, char)’: user.cpp:106:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->go[ch]) return node->go[ch]; ^ user.cpp:106:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->go[ch]) return node->go[ch]; ^ user.cpp:107:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->next[ch]) return node->go[ch] = node->next[ch]; ^ user.cpp:107:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->next[ch]) return node->go[ch] = node->next[ch]; ^ user.cpp:107:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->next[ch]) return node->go[ch] = node->next[ch]; ^ user.cpp:108:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!node->fth) return node->go[ch] = node; ^ user.cpp:110:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] return node->go[ch] = go(getLink(node), ch); ^ user.cpp: In function ‘int main()’: user.cpp:67:39: 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:68:41: 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:75:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s %d", a, &n); ^ user.cpp:78:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %s", s[i]); ^