Compilare: user.cpp: In function ‘long long int word2hash(char*)’: user.cpp:35:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] hash += crtPower * char2number[s[i]]; ^ user.cpp: In function ‘int main()’: user.cpp:65:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=WORD_LENGTH; i < strlen(text); ++i) ^ user.cpp:67:68: warning: array subscript has type ‘char’ [-Wchar-subscripts] crtHash = crtHash / 4 + BIGGEST_POWER * char2number[text[i]]; ^