Compilare: user.c: In function ‘main’: user.c:8:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &lenght); ^ user.c:11:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%c", &ant, &ch); ^ user.c:19:6: warning: ‘hch’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (hch == 'D') { ^