Compilare: main.cpp: In function 'void {anonymous}::rollhash(int)': main.cpp:162:29: warning: array subscript has type 'char' [-Wchar-subscripts] now = now + unord[str[dr]]; ^ main.cpp:165:28: warning: array subscript has type 'char' [-Wchar-subscripts] now = now - unord[str[st]]; } } ^ main.cpp: In function '{anonymous}::Hash {anonymous}::gethash(const string&)': main.cpp:178:23: warning: array subscript has type 'char' [-Wchar-subscripts] res = res + unord[ch]; ^ main.cpp: In function 'void {anonymous}::initialize()': main.cpp:214:11: warning: array subscript has type 'char' [-Wchar-subscripts] unord[ch] = now; ^