Compilare: user.cpp:9:10: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp: In function ‘int add(char)’: user.cpp:39:68: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (; p!=-1 && st[p].next[c-'a']==q; p=st[p].link) st[p].next[c]=clone; ^ user.cpp: In function ‘int main()’: user.cpp:60:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<s.length(); ++i) { ^