Compilare: user.cpp: In function ‘void add(char*, int, trie*)’: user.cpp:18:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] int delta=norm[*p]; ^ user.cpp: In function ‘int find(char*, trie*)’: user.cpp:27:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] int delta=norm[*p]; ^ user.cpp: In function ‘int main()’: user.cpp:47:14: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] in>>P+1; ^