Compilare: user.c: In function ‘main’: user.c:10:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &k); ^ user.c:13:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i * k + j]); ^ user.c:30:13: warning: ‘nt’ may be used uninitialized in this function [-Wmaybe-uninitialized] next[i] = nt; ^