Compilare: user.cpp: In function ‘void add(char*)’: user.cpp:25:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0) ^ user.cpp:26:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] q->fii[s[i]]=new tri; ^ user.cpp:27:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^ user.cpp: In function ‘int cuv(char*)’: user.cpp:38:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0)return 0; ^ user.cpp:39:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^ user.cpp: In function ‘int pref(char*)’: user.cpp:49:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0||(q->fii[s[i]]->pref==0))return i; ^ user.cpp:49:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(q->fii[s[i]]==0||(q->fii[s[i]]->pref==0))return i; ^ user.cpp:50:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^ user.cpp: In function ‘void del(char*)’: user.cpp:61:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=q->fii[s[i]]; ^ user.cpp: In function ‘int main()’: user.cpp:74:31: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[25]’ [-Wformat=] while(scanf("%d %s",&op,&s)!=EOF) ^ user.cpp:69:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trie.in","r",stdin); ^ user.cpp:70:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trie.out","w",stdout); ^