Compilare: user.c: In function ‘main’: user.c:19:32: warning: unused variable ‘ci’ [-Wunused-variable] int r, c, nr, i, j, q, cj, ci, l, cl; ^ user.c:19:28: warning: unused variable ‘cj’ [-Wunused-variable] int r, c, nr, i, j, q, cj, ci, l, cl; ^ user.c:21:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &r, &c); ^ user.c:25:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &nr); ^