Compilare: main.cpp: In function 'void rollhash(int)': main.cpp:161:29: warning: array subscript has type 'char' [-Wchar-subscripts] now = now + unord[str[dr]]; ^ main.cpp:164:28: warning: array subscript has type 'char' [-Wchar-subscripts] now = now - unord[str[st]]; } } ^ main.cpp: In function 'Hash gethash(const string&)': main.cpp:177:23: warning: array subscript has type 'char' [-Wchar-subscripts] res = res + unord[ch]; ^ main.cpp: In function 'void initialize()': main.cpp:213:11: warning: array subscript has type 'char' [-Wchar-subscripts] unord[ch] = now; ^