Compilare: user.c: In function ‘main’: user.c:97:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d %d", &l, &c, &N, &L); ^ user.c:101:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &x); ^ user.c:111:9: warning: ‘prev’ may be used uninitialized in this function [-Wmaybe-uninitialized] init(N + 1, steps); ^