Compilare: user.c: In function ‘main’: user.c:13:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[ch] = i; ^ user.c:22:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr[p[ch]]++; ^ user.c:15:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &t); ^ user.c:18:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d ", &n); ^