Compilare: user.cpp: In function ‘int main()’: user.cpp:33:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] int l = 1 + arr[first].count; ^ user.cpp:35:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(l > arr[last].count) ^ user.cpp:37:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] arr[last].count = l; ^ user.cpp:38:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] arr[last].pos = n; ^ user.cpp:39:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] pos[n] = arr[first].pos; ^ user.cpp:42:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(max_count < arr[last].count) ^ user.cpp:44:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] max_count = arr[last].count; ^ user.cpp:55:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] int p = arr[last_letter].pos; ^