Compilare: user.cpp: In function ‘bool cmp(char, char)’: user.cpp:10:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i = 1; i <= max (k[a],k[b]); i ++) { ^ user.cpp:10:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i = 1; i <= max (k[a],k[b]); i ++) { ^ user.cpp:11:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (s[a][i] != s[b][i]) { ^ user.cpp:11:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (s[a][i] != s[b][i]) { ^ user.cpp:12:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] x = s[a][i]; ^ user.cpp:13:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] y = s[b][i]; ^ user.cpp: In function ‘int main()’: user.cpp:27:20: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] in >> s[i] + 1; ^