Compilare: user.cpp: In function ‘void bad()’: user.cpp:16:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] badmatch[pat[i]] = n - i - 1; ^ user.cpp: In function ‘int main()’: user.cpp:41:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] i+=badmatch[str[k-1]]; ^ user.cpp:46:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] i+=badmatch[pat[n-1]]; ^