Compilare: user.c: In function ‘precalc’: user.c:24:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr[poz[s[j]]][p]++; ^ user.c:25:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(nr[poz[s[j]]][p] > max[p]){ ^ user.c: In function ‘main’: user.c:38:25: warning: unused variable ‘aux’ [-Wunused-variable] int n, m, i, j, x, y, aux; ^ user.c:39:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d ", &n, &m); ^ user.c:40:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, n + 2, in); ^ user.c:47:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x, &y); ^