Compilare: user.cpp: In member function ‘void ahtree::insert(char*)’: user.cpp:33:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] repetition[index[0]].push_back(cindex); ^ user.cpp: In function ‘void fix_failure()’: user.cpp:64:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < (now ->failure ->index).size(); i ++){ ^ user.cpp: In function ‘void search()’: user.cpp:97:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < (now ->index).size(); i ++){ ^ user.cpp:98:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++ ord[(now ->index)[i]]; ^ user.cpp:111:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < repetition[i].size(); j ++){ ^ user.cpp:112:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] ord[repetition[i][j]] += ord[i]; ^