Compilare: user.c: In function ‘rsort’: user.c:22:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] next[j] = ult[cuv[point[j]][i]]; ^ user.c:23:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] ult[cuv[point[j]][i]] = j; ^ user.c: In function ‘main’: user.c:47:8: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.c:48:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d ", &n); ^ user.c:50:10: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(cuv[i], 100, in); ^